38865990 has 16 divisors (see below), whose sum is σ = 93278448. Its totient is φ = 10364256.

The previous prime is 38865979. The next prime is 38866019. The reversal of 38865990 is 9956883.

It is a super-3 number, since 3×38865990³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647737 + ... + 647796.

It is an arithmetic number, because the mean of its divisors is an integer number (5829903).

Almost surely, 2^38865990 is an apocalyptic number.

38865990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38865990 is an abundant number, since it is smaller than the sum of its proper divisors (54412458).

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

38865990 is a wasteful number, since it uses less digits than its factorization.

38865990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295543.

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

The square root of 38865990 is about 6234.2593786271. The cubic root of 38865990 is about 338.7322744137.

The spelling of 38865990 in words is "thirty-eight million, eight hundred sixty-five thousand, nine hundred ninety".