385761664 has 32 divisors (see below), whose sum is σ = 769724640. Its totient is φ = 192576000.

The previous prime is 385761653. The next prime is 385761697. The reversal of 385761664 is 466167583.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×385761664² = 297624122824097792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 94122 + ... + 98134.

It is an arithmetic number, because the mean of its divisors is an integer number (24053895).

Almost surely, 2^385761664 is an apocalyptic number.

It is an amenable number.

385761664 is a deficient number, since it is larger than the sum of its proper divisors (383962976).

385761664 is an equidigital number, since it uses as much as digits as its factorization.

385761664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4778 (or 4766 counting only the distinct ones).

The product of its digits is 725760, while the sum is 46.

The square root of 385761664 is about 19640.8162763160. The cubic root of 385761664 is about 727.9580541786.

The spelling of 385761664 in words is "three hundred eighty-five million, seven hundred sixty-one thousand, six hundred sixty-four".