386628690 has 32 divisors (see below), whose sum is σ = 1060467840. Its totient is φ = 88372224.

The previous prime is 386628679. The next prime is 386628713. The reversal of 386628690 is 96826683.

It is a super-2 number, since 2×386628690² = 298963487862232200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 920335 + ... + 920754.

It is an arithmetic number, because the mean of its divisors is an integer number (33139620).

Almost surely, 2^386628690 is an apocalyptic number.

386628690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

386628690 is an abundant number, since it is smaller than the sum of its proper divisors (673839150).

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

386628690 is a wasteful number, since it uses less digits than its factorization.

386628690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841106.

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 386628690 is about 19662.8759341049. The cubic root of 386628690 is about 728.5030247747.

The spelling of 386628690 in words is "three hundred eighty-six million, six hundred twenty-eight thousand, six hundred ninety".