38720164 has 24 divisors (see below), whose sum is σ = 78378048. Its totient is φ = 16393440.

The previous prime is 38720137. The next prime is 38720189. The reversal of 38720164 is 46102783.

It is a super-2 number, since 2×38720164² = 2998502200373792, which contains 22 as substring.

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, 6007 + ... + 10654.

It is an arithmetic number, because the mean of its divisors is an integer number (3265752).

Almost surely, 2^38720164 is an apocalyptic number.

It is an amenable number.

38720164 is an abundant number, since it is smaller than the sum of its proper divisors (39657884).

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

38720164 is a wasteful number, since it uses less digits than its factorization.

38720164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16755 (or 16753 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 38720164 is about 6222.5528523268. The cubic root of 38720164 is about 338.3080999621.

The spelling of 38720164 in words is "thirty-eight million, seven hundred twenty thousand, one hundred sixty-four".