388457 has 4 divisors (see below), whose sum is σ = 389760. Its totient is φ = 387156.

The previous prime is 388403. The next prime is 388459. The reversal of 388457 is 754883.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 388457 - 2¹⁰ = 387433 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388459) 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, 44 + ... + 882.

It is an arithmetic number, because the mean of its divisors is an integer number (97440).

2³⁸⁸⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

388457 is a deficient number, since it is larger than the sum of its proper divisors (1303).

388457 is an equidigital number, since it uses as much as digits as its factorization.

388457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302.

The product of its digits is 26880, while the sum is 35.

The square root of 388457 is about 623.2631867839. The cubic root of 388457 is about 72.9649547178.

The spelling of 388457 in words is "three hundred eighty-eight thousand, four hundred fifty-seven".