387257864 has 16 divisors (see below), whose sum is σ = 829838400. Its totient is φ = 165967632.

The previous prime is 387257809. The next prime is 387257869. The reversal of 387257864 is 468752783.

It is not an unprimeable number, because it can be changed into a prime (387257869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3457604 + ... + 3457715.

It is an arithmetic number, because the mean of its divisors is an integer number (51864900).

Almost surely, 2^387257864 is an apocalyptic number.

It is an amenable number.

387257864 is an abundant number, since it is smaller than the sum of its proper divisors (442580536).

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

387257864 is a wasteful number, since it uses less digits than its factorization.

387257864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6915332 (or 6915328 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 50.

The square root of 387257864 is about 19678.8684634051. The cubic root of 387257864 is about 728.8979831816.

The spelling of 387257864 in words is "three hundred eighty-seven million, two hundred fifty-seven thousand, eight hundred sixty-four".