3857638 has 16 divisors (see below), whose sum is σ = 6032880. Its totient is φ = 1847776.

The previous prime is 3857621. The next prime is 3857641. The reversal of 3857638 is 8367583.

It is a self number, because there is not a number n which added to its sum of digits gives 3857638.

It is a congruent number.

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, 13020 + ... + 13312.

It is an arithmetic number, because the mean of its divisors is an integer number (377055).

Almost surely, 2^3857638 is an apocalyptic number.

3857638 is a deficient number, since it is larger than the sum of its proper divisors (2175242).

3857638 is a wasteful number, since it uses less digits than its factorization.

3857638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551.

The product of its digits is 120960, while the sum is 40.

The square root of 3857638 is about 1964.0870652799. The cubic root of 3857638 is about 156.8340979486.

The spelling of 3857638 in words is "three million, eight hundred fifty-seven thousand, six hundred thirty-eight".