386607640 has 32 divisors (see below), whose sum is σ = 872862480. Its totient is φ = 154110592.

The previous prime is 386607629. The next prime is 386607643. The reversal of 386607640 is 46706683.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 386607593 and 386607602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386607643) 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, 4774 + ... + 28213.

Almost surely, 2^386607640 is an apocalyptic number.

It is an amenable number.

386607640 is an abundant number, since it is smaller than the sum of its proper divisors (486254840).

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

386607640 is a wasteful number, since it uses less digits than its factorization.

386607640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33291 (or 33287 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 386607640 is about 19662.3406541541. The cubic root of 386607640 is about 728.4898034184.

The spelling of 386607640 in words is "three hundred eighty-six million, six hundred seven thousand, six hundred forty".