38720392 has 8 divisors (see below), whose sum is σ = 72600750. Its totient is φ = 19360192.

The previous prime is 38720387. The next prime is 38720417. The reversal of 38720392 is 29302783.

It can be written as a sum of positive squares in only one way, i.e., 19483396 + 19236996 = 4414^2 + 4386^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2420017 + ... + 2420032.

Almost surely, 2^38720392 is an apocalyptic number.

It is an amenable number.

38720392 is a deficient number, since it is larger than the sum of its proper divisors (33880358).

38720392 is a wasteful number, since it uses less digits than its factorization.

38720392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4840055 (or 4840051 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 38720392 is about 6222.5711727549. The cubic root of 38720392 is about 338.3087639925.

The spelling of 38720392 in words is "thirty-eight million, seven hundred twenty thousand, three hundred ninety-two".