3857657238 has 40 divisors (see below), whose sum is σ = 9152487432. Its totient is φ = 1210244544.

The previous prime is 3857657231. The next prime is 3857657261. The reversal of 3857657238 is 8327567583.

3857657238 is a `hidden beast` number, since 38 + 5 + 7 + 6 + 572 + 38 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3857657231) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 697620 + ... + 703127.

Almost surely, 2^3857657238 is an apocalyptic number.

3857657238 is an abundant number, since it is smaller than the sum of its proper divisors (5294830194).

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

3857657238 is a wasteful number, since it uses less digits than its factorization.

3857657238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400778 (or 1400769 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 54.

The square root of 3857657238 is about 62110.0413620857. The cubic root of 3857657238 is about 1568.3435865812.

The spelling of 3857657238 in words is "three billion, eight hundred fifty-seven million, six hundred fifty-seven thousand, two hundred thirty-eight".