38745990 has 24 divisors (see below), whose sum is σ = 100739808. Its totient is φ = 10332240.

The previous prime is 38745989. The next prime is 38746003. The reversal of 38745990 is 9954783.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215166 + ... + 215345.

It is an arithmetic number, because the mean of its divisors is an integer number (4197492).

Almost surely, 2^38745990 is an apocalyptic number.

38745990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38745990 is an abundant number, since it is smaller than the sum of its proper divisors (61993818).

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

38745990 is a wasteful number, since it uses less digits than its factorization.

38745990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430524 (or 430521 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 38745990 is about 6224.6276997102. The cubic root of 38745990 is about 338.3832993955.

The spelling of 38745990 in words is "thirty-eight million, seven hundred forty-five thousand, nine hundred ninety".