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13201988 = 2211232939
BaseRepresentation
bin110010010111…
…001001000100
3220211201201112
4302113021010
511334430423
61150544152
7220133522
oct62271104
926751645
1013201988
1174a7938
124508058
132973137
141a79312
15125ba78
hexc97244

13201988 has 12 divisors (see below), whose sum is σ = 23131920. Its totient is φ = 6592872.

The previous prime is 13201967. The next prime is 13201997. The reversal of 13201988 is 88910231.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3023 + ... + 5961.

It is an arithmetic number, because the mean of its divisors is an integer number (1927660).

Almost surely, 213201988 is an apocalyptic number.

It is an amenable number.

13201988 is a deficient number, since it is larger than the sum of its proper divisors (9929932).

13201988 is a wasteful number, since it uses less digits than its factorization.

13201988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066 (or 4064 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 13201988 is about 3633.4540041123. The cubic root of 13201988 is about 236.3450138995.

The spelling of 13201988 in words is "thirteen million, two hundred one thousand, nine hundred eighty-eight".

Divisors: 1 2 4 1123 2246 2939 4492 5878 11756 3300497 6600994 13201988