689431560 has 32 divisors (see below), whose sum is σ = 2068295040. Its totient is φ = 183848384.

The previous prime is 689431559. The next prime is 689431591. The reversal of 689431560 is 65134986.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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, 2872512 + ... + 2872751.

It is an arithmetic number, because the mean of its divisors is an integer number (64634220).

Almost surely, 2^689431560 is an apocalyptic number.

689431560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

689431560 is an abundant number, since it is smaller than the sum of its proper divisors (1378863480).

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

689431560 is a wasteful number, since it uses less digits than its factorization.

689431560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5745277 (or 5745273 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 689431560 is about 26257.0287732637. The cubic root of 689431560 is about 883.4128660638.

The spelling of 689431560 in words is "six hundred eighty-nine million, four hundred thirty-one thousand, five hundred sixty".