389767690 has 16 divisors (see below), whose sum is σ = 755549928. Its totient is φ = 143914176.

The previous prime is 389767673. The next prime is 389767711. The reversal of 389767690 is 96767983.

It can be written as a sum of positive squares in 4 ways, for example, as 201611601 + 188156089 = 14199^2 + 13717^2 .

It is a super-2 number, since 2×389767690² = 303837704335872200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1498977 + ... + 1499236.

Almost surely, 2^389767690 is an apocalyptic number.

389767690 is a deficient number, since it is larger than the sum of its proper divisors (365782238).

389767690 is a wasteful number, since it uses less digits than its factorization.

389767690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998233.

The product of its (nonzero) digits is 3429216, while the sum is 55.

The square root of 389767690 is about 19742.5350449227. The cubic root of 389767690 is about 730.4692610531.

The spelling of 389767690 in words is "three hundred eighty-nine million, seven hundred sixty-seven thousand, six hundred ninety".