385131664 has 10 divisors (see below), whose sum is σ = 746192630. Its totient is φ = 192565824.

The previous prime is 385131661. The next prime is 385131667. The reversal of 385131664 is 466131583.

It is an interprime number because it is at equal distance from previous prime (385131661) and next prime (385131667).

It can be written as a sum of positive squares in only one way, i.e., 299013264 + 86118400 = 17292^2 + 9280^2 .

It is not an unprimeable number, because it can be changed into a prime (385131661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12035349 + ... + 12035380.

It is an arithmetic number, because the mean of its divisors is an integer number (74619263).

Almost surely, 2^385131664 is an apocalyptic number.

It is an amenable number.

385131664 is a deficient number, since it is larger than the sum of its proper divisors (361060966).

385131664 is a wasteful number, since it uses less digits than its factorization.

385131664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24070737 (or 24070731 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 385131664 is about 19624.7716929395. The cubic root of 385131664 is about 727.5615542128.

The spelling of 385131664 in words is "three hundred eighty-five million, one hundred thirty-one thousand, six hundred sixty-four".