38897872 has 20 divisors (see below), whose sum is σ = 81162340. Its totient is φ = 17952768.

The previous prime is 38897869. The next prime is 38897891. The reversal of 38897872 is 27879883.

It can be written as a sum of positive squares in 2 ways, for example, as 17774656 + 21123216 = 4216^2 + 4596^2 .

It is a super-2 number, since 2×38897872² = 3026088892256768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

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, 93297 + ... + 93712.

It is an arithmetic number, because the mean of its divisors is an integer number (4058117).

Almost surely, 2^38897872 is an apocalyptic number.

It is an amenable number.

38897872 is an abundant number, since it is smaller than the sum of its proper divisors (42264468).

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

38897872 is a wasteful number, since it uses less digits than its factorization.

38897872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187030 (or 187024 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 52.

The square root of 38897872 is about 6236.8158542641. The cubic root of 38897872 is about 338.8248704577.

The spelling of 38897872 in words is "thirty-eight million, eight hundred ninety-seven thousand, eight hundred seventy-two".