38939910 has 32 divisors (see below), whose sum is σ = 95984352. Its totient is φ = 10103040.

The previous prime is 38939909. The next prime is 38939917. The reversal of 38939910 is 1993983.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38939917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16431 + ... + 18650.

It is an arithmetic number, because the mean of its divisors is an integer number (2999511).

Almost surely, 2^38939910 is an apocalyptic number.

38939910 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38939910 is an abundant number, since it is smaller than the sum of its proper divisors (57044442).

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

38939910 is a wasteful number, since it uses less digits than its factorization.

38939910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35128.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 38939910 is about 6240.1850934087. The cubic root of 38939910 is about 338.9468856317.

The spelling of 38939910 in words is "thirty-eight million, nine hundred thirty-nine thousand, nine hundred ten".