38951990 has 32 divisors (see below), whose sum is σ = 87416064. Its totient is φ = 12140640.

The previous prime is 38951989. The next prime is 38952019. The reversal of 38951990 is 9915983.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24524 + ... + 26063.

It is an arithmetic number, because the mean of its divisors is an integer number (2731752).

Almost surely, 2^38951990 is an apocalyptic number.

38951990 is an abundant number, since it is smaller than the sum of its proper divisors (48464074).

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

38951990 is a wasteful number, since it uses less digits than its factorization.

38951990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50612.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 38951990 is about 6241.1529383600. The cubic root of 38951990 is about 338.9819315529.

It can be divided in two parts, 3895 and 1990, that added together give a palindrome (5885).

The spelling of 38951990 in words is "thirty-eight million, nine hundred fifty-one thousand, nine hundred ninety".