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38071481 = 72776969
BaseRepresentation
bin1001000100111…
…0110010111001
32122122020020212
42101032302321
534221241411
63440000505
7641413400
oct221166271
978566225
1038071481
111a543738
1210900135
137b6cb06
1450b0637
15352068b
hex244ecb9

38071481 has 6 divisors (see below), whose sum is σ = 44287290. Its totient is φ = 32632656.

The previous prime is 38071427. The next prime is 38071511. The reversal of 38071481 is 18417083.

38071481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 30426256 + 7645225 = 5516^2 + 2765^2 .

It is not a de Polignac number, because 38071481 - 210 = 38070457 is a prime.

It is a super-2 number, since 2×380714812 = 2898875331066722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38071181) 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 5 ways as a sum of consecutive naturals, for example, 388436 + ... + 388533.

It is an arithmetic number, because the mean of its divisors is an integer number (7381215).

Almost surely, 238071481 is an apocalyptic number.

It is an amenable number.

38071481 is a deficient number, since it is larger than the sum of its proper divisors (6215809).

38071481 is an equidigital number, since it uses as much as digits as its factorization.

38071481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776983 (or 776976 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 38071481 is about 6170.2091536673. The cubic root of 38071481 is about 336.4082133431.

The spelling of 38071481 in words is "thirty-eight million, seventy-one thousand, four hundred eighty-one".

Divisors: 1 7 49 776969 5438783 38071481