38657428 has 12 divisors (see below), whose sum is σ = 67760532. Its totient is φ = 19297280.

The previous prime is 38657407. The next prime is 38657461. The reversal of 38657428 is 82475683.

It can be written as a sum of positive squares in 2 ways, for example, as 16548624 + 22108804 = 4068^2 + 4702^2 .

It is a congruent number.

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, 4975 + ... + 10102.

It is an arithmetic number, because the mean of its divisors is an integer number (5646711).

Almost surely, 2^38657428 is an apocalyptic number.

It is an amenable number.

38657428 is a deficient number, since it is larger than the sum of its proper divisors (29103104).

38657428 is a wasteful number, since it uses less digits than its factorization.

38657428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15722 (or 15720 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 38657428 is about 6217.5097909050. The cubic root of 38657428 is about 338.1252876337.

The spelling of 38657428 in words is "thirty-eight million, six hundred fifty-seven thousand, four hundred twenty-eight".