389491268 has 6 divisors (see below), whose sum is σ = 681609726. Its totient is φ = 194745632.

The previous prime is 389491259. The next prime is 389491309. The reversal of 389491268 is 862194983.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 303038464 + 86452804 = 17408^2 + 9298^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48686405 + ... + 48686412.

It is an arithmetic number, because the mean of its divisors is an integer number (113601621).

Almost surely, 2^389491268 is an apocalyptic number.

It is an amenable number.

389491268 is a deficient number, since it is larger than the sum of its proper divisors (292118458).

389491268 is a wasteful number, since it uses less digits than its factorization.

389491268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97372821 (or 97372819 counting only the distinct ones).

The product of its digits is 746496, while the sum is 50.

The square root of 389491268 is about 19735.5331318918. The cubic root of 389491268 is about 730.2965380601.

The spelling of 389491268 in words is "three hundred eighty-nine million, four hundred ninety-one thousand, two hundred sixty-eight".