388970257 has 8 divisors (see below), whose sum is σ = 419230784. Its totient is φ = 358758288.

The previous prime is 388970213. The next prime is 388970269. The reversal of 388970257 is 752079883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 388970257 - 2⁷ = 388970129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 388970257.

It is not an unprimeable number, because it can be changed into a prime (388971257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5458 + ... + 28420.

It is an arithmetic number, because the mean of its divisors is an integer number (52403848).

Almost surely, 2^388970257 is an apocalyptic number.

It is an amenable number.

388970257 is a deficient number, since it is larger than the sum of its proper divisors (30260527).

388970257 is a wasteful number, since it uses less digits than its factorization.

388970257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24279.

The product of its (nonzero) digits is 846720, while the sum is 49.

The square root of 388970257 is about 19722.3288939212. The cubic root of 388970257 is about 729.9707606979.

The spelling of 388970257 in words is "three hundred eighty-eight million, nine hundred seventy thousand, two hundred fifty-seven".