388257 has 4 divisors (see below), whose sum is σ = 517680. Its totient is φ = 258836.

The previous prime is 388253. The next prime is 388259. The reversal of 388257 is 752883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 388257 - 2² = 388253 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (388253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64707 + ... + 64712.

It is an arithmetic number, because the mean of its divisors is an integer number (129420).

388257 is a Friedman number, since it can be written as 5^8-37*8^2, using all its digits and the basic arithmetic operations.

2³⁸⁸²⁵⁷ is an apocalyptic number.

It is an amenable number.

388257 is a deficient number, since it is larger than the sum of its proper divisors (129423).

388257 is a wasteful number, since it uses less digits than its factorization.

388257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129422.

The product of its digits is 13440, while the sum is 33.

The square root of 388257 is about 623.1027202637. The cubic root of 388257 is about 72.9524303834.

The spelling of 388257 in words is "three hundred eighty-eight thousand, two hundred fifty-seven".