386669290 has 24 divisors (see below), whose sum is σ = 809639172. Its totient is φ = 132572160.

The previous prime is 386669251. The next prime is 386669299. The reversal of 386669290 is 92966683.

It can be written as a sum of positive squares in 2 ways, for example, as 386633569 + 35721 = 19663^2 + 189^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (386669299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394071 + ... + 395050.

Almost surely, 2^386669290 is an apocalyptic number.

386669290 is an abundant number, since it is smaller than the sum of its proper divisors (422969882).

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

386669290 is a wasteful number, since it uses less digits than its factorization.

386669290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789142 (or 789135 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 386669290 is about 19663.9083093875. The cubic root of 386669290 is about 728.5285239926.

The spelling of 386669290 in words is "three hundred eighty-six million, six hundred sixty-nine thousand, two hundred ninety".