38685990 has 48 divisors (see below), whose sum is σ = 108009072. Its totient is φ = 8842176.

The previous prime is 38685967. The next prime is 38686007. The reversal of 38685990 is 9958683.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11689 + ... + 14628.

It is an arithmetic number, because the mean of its divisors is an integer number (2250189).

Almost surely, 2^38685990 is an apocalyptic number.

38685990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38685990 is an abundant number, since it is smaller than the sum of its proper divisors (69323082).

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

38685990 is a wasteful number, since it uses less digits than its factorization.

38685990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26341 (or 26334 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 38685990 is about 6219.8062670794. The cubic root of 38685990 is about 338.2085416374.

The spelling of 38685990 in words is "thirty-eight million, six hundred eighty-five thousand, nine hundred ninety".