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216174940 = 22510808747
BaseRepresentation
bin11001110001010…
…01000101011100
3120001202211021021
430320221011130
5420320044230
633241213524
75233312432
oct1470510534
9501684237
10216174940
11101030483
12604912a4
1335a2b687
14209d2d52
1513ea1c7a
hexce2915c

216174940 has 12 divisors (see below), whose sum is σ = 453967416. Its totient is φ = 86469968.

The previous prime is 216174929. The next prime is 216174943. The reversal of 216174940 is 49471612.

216174940 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

216174940 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 216174896 and 216174905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216174943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5404354 + ... + 5404393.

It is an arithmetic number, because the mean of its divisors is an integer number (37830618).

Almost surely, 2216174940 is an apocalyptic number.

216174940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216174940 is an abundant number, since it is smaller than the sum of its proper divisors (237792476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216174940 is a wasteful number, since it uses less digits than its factorization.

216174940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10808756 (or 10808754 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 216174940 is about 14702.8888317908. Note that the first 4 decimals coincide. The cubic root of 216174940 is about 600.1619377711.

The spelling of 216174940 in words is "two hundred sixteen million, one hundred seventy-four thousand, nine hundred forty".

Divisors: 1 2 4 5 10 20 10808747 21617494 43234988 54043735 108087470 216174940