38490856 has 32 divisors (see below), whose sum is σ = 77482440. Its totient is φ = 17860608.

The previous prime is 38490847. The next prime is 38490857. The reversal of 38490856 is 65809483.

It can be written as a sum of positive squares in 4 ways, for example, as 34222500 + 4268356 = 5850^2 + 2066^2 .

It is a super-2 number, since 2×38490856² = 2963091991225472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38490857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7990 + ... + 11866.

Almost surely, 2^38490856 is an apocalyptic number.

It is an amenable number.

38490856 is an abundant number, since it is smaller than the sum of its proper divisors (38991584).

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

38490856 is a wasteful number, since it uses less digits than its factorization.

38490856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973 (or 3969 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 38490856 is about 6204.0999347206. The cubic root of 38490856 is about 337.6389361215.

The spelling of 38490856 in words is "thirty-eight million, four hundred ninety thousand, eight hundred fifty-six".