38139620 has 48 divisors (see below), whose sum is σ = 82252800. Its totient is φ = 14851200.

The previous prime is 38139617. The next prime is 38139643. The reversal of 38139620 is 2693183.

It is a super-2 number, since 2×38139620² = 2909261227488800, which contains 22 as substring.

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, 159461 + ... + 159699.

It is an arithmetic number, because the mean of its divisors is an integer number (1713600).

Almost surely, 2^38139620 is an apocalyptic number.

It is an amenable number.

38139620 is an abundant number, since it is smaller than the sum of its proper divisors (44113180).

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

38139620 is a wasteful number, since it uses less digits than its factorization.

38139620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 38139620 is about 6175.7282971322. The cubic root of 38139620 is about 336.6087909313.

The spelling of 38139620 in words is "thirty-eight million, one hundred thirty-nine thousand, six hundred twenty".