38915988 has 12 divisors (see below), whose sum is σ = 90804000. Its totient is φ = 12971992.

The previous prime is 38915963. The next prime is 38915993. The reversal of 38915988 is 88951983.

38915988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×38915988² = 3028908244032288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38915988.

It is a congruent number.

It is an unprimeable number.

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, 1621488 + ... + 1621511.

It is an arithmetic number, because the mean of its divisors is an integer number (7567000).

Almost surely, 2^38915988 is an apocalyptic number.

It is an amenable number.

38915988 is an abundant number, since it is smaller than the sum of its proper divisors (51888012).

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

38915988 is a wasteful number, since it uses less digits than its factorization.

38915988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3243006 (or 3243004 counting only the distinct ones).

The product of its digits is 622080, while the sum is 51.

The square root of 38915988 is about 6238.2680288683. The cubic root of 38915988 is about 338.8774628694.

It can be divided in two parts, 38915 and 988, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 38915988 in words is "thirty-eight million, nine hundred fifteen thousand, nine hundred eighty-eight".