386138440 has 32 divisors (see below), whose sum is σ = 872948160. Its totient is φ = 153720000.

The previous prime is 386138437. The next prime is 386138447. The reversal of 386138440 is 44831683.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 386138440.

It is not an unprimeable number, because it can be changed into a prime (386138447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14436 + ... + 31315.

It is an arithmetic number, because the mean of its divisors is an integer number (27279630).

Almost surely, 2^386138440 is an apocalyptic number.

It is an amenable number.

386138440 is an abundant number, since it is smaller than the sum of its proper divisors (486809720).

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

386138440 is a wasteful number, since it uses less digits than its factorization.

386138440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45973 (or 45969 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 386138440 is about 19650.4055937785. The cubic root of 386138440 is about 728.1949775623.

The spelling of 386138440 in words is "three hundred eighty-six million, one hundred thirty-eight thousand, four hundred forty".