689139392 has 28 divisors (see below), whose sum is σ = 1368344736. Its totient is φ = 344359680.

The previous prime is 689139389. The next prime is 689139397. The reversal of 689139392 is 293931986.

It is a super-2 number, since 2×689139392² = 949826203212259328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 689139392.

It is not an unprimeable number, because it can be changed into a prime (689139397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204473 + ... + 207815.

Almost surely, 2^689139392 is an apocalyptic number.

It is an amenable number.

689139392 is a deficient number, since it is larger than the sum of its proper divisors (679205344).

689139392 is a wasteful number, since it uses less digits than its factorization.

689139392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6576 (or 6566 counting only the distinct ones).

The product of its digits is 629856, while the sum is 50.

The square root of 689139392 is about 26251.4645686674. The cubic root of 689139392 is about 883.2880572340.

The spelling of 689139392 in words is "six hundred eighty-nine million, one hundred thirty-nine thousand, three hundred ninety-two".