38720428 has 12 divisors (see below), whose sum is σ = 68619040. Its totient is φ = 19114992.

The previous prime is 38720417. The next prime is 38720443. The reversal of 38720428 is 82402783.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 38720393 and 38720402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60951 + ... + 61582.

Almost surely, 2^38720428 is an apocalyptic number.

It is an amenable number.

38720428 is a deficient number, since it is larger than the sum of its proper divisors (29898612).

38720428 is a wasteful number, since it uses less digits than its factorization.

38720428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122616 (or 122614 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 38720428 is about 6222.5740654491. The cubic root of 38720428 is about 338.3088688391.

The spelling of 38720428 in words is "thirty-eight million, seven hundred twenty thousand, four hundred twenty-eight".