386664729 has 24 divisors (see below), whose sum is σ = 575896032. Its totient is φ = 228856320.

The previous prime is 386664703. The next prime is 386664731. The reversal of 386664729 is 927466683.

It is a happy number.

It is not a de Polignac number, because 386664729 - 2⁹ = 386664217 is a prime.

It is a super-2 number, since 2×386664729² = 299019225305286882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (366664729) 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 23 ways as a sum of consecutive naturals, for example, 57849 + ... + 64185.

It is an arithmetic number, because the mean of its divisors is an integer number (23995668).

Almost surely, 2^386664729 is an apocalyptic number.

It is an amenable number.

386664729 is a deficient number, since it is larger than the sum of its proper divisors (189231303).

386664729 is a wasteful number, since it uses less digits than its factorization.

386664729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6437 (or 6394 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 51.

The square root of 386664729 is about 19663.7923351524. The cubic root of 386664729 is about 728.5256595019.

The spelling of 386664729 in words is "three hundred eighty-six million, six hundred sixty-four thousand, seven hundred twenty-nine".