386136640 has 56 divisors (see below), whose sum is σ = 973589112. Its totient is φ = 145367040.

The previous prime is 386136637. The next prime is 386136659. The reversal of 386136640 is 46631683.

It can be written as a sum of positive squares in 4 ways, for example, as 200958976 + 185177664 = 14176^2 + 13608^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 386136640.

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 7 ways as a sum of consecutive naturals, for example, 30051 + ... + 40930.

Almost surely, 2^386136640 is an apocalyptic number.

It is an amenable number.

386136640 is an abundant number, since it is smaller than the sum of its proper divisors (587452472).

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

386136640 is a wasteful number, since it uses less digits than its factorization.

386136640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71015 (or 71005 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 386136640 is about 19650.3597931437. The cubic root of 386136640 is about 728.1938460570.

It can be divided in two parts, 386 and 136640, that added together give a triangular number (137026 = T₅₂₃).

The spelling of 386136640 in words is "three hundred eighty-six million, one hundred thirty-six thousand, six hundred forty".