386620690 has 16 divisors (see below), whose sum is σ = 709048728. Its totient is φ = 151730176.

The previous prime is 386620679. The next prime is 386620691. The reversal of 386620690 is 96026683.

It can be written as a sum of positive squares in 4 ways, for example, as 373610241 + 13010449 = 19329^2 + 3607^2 .

It is a super-2 number, since 2×386620690² = 298951115872152200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (386620691) 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, 364207 + ... + 365266.

Almost surely, 2^386620690 is an apocalyptic number.

386620690 is a deficient number, since it is larger than the sum of its proper divisors (322428038).

386620690 is a wasteful number, since it uses less digits than its factorization.

386620690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729533.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 386620690 is about 19662.6725040112. The cubic root of 386620690 is about 728.4980000878.

The spelling of 386620690 in words is "three hundred eighty-six million, six hundred twenty thousand, six hundred ninety".