689331816 has 32 divisors (see below), whose sum is σ = 1914811200. Its totient is φ = 229777200.

The previous prime is 689331787. The next prime is 689331817. The reversal of 689331816 is 618133986.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (689331817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1595460 + ... + 1595891.

It is an arithmetic number, because the mean of its divisors is an integer number (59837850).

Almost surely, 2^689331816 is an apocalyptic number.

It is an amenable number.

689331816 is an abundant number, since it is smaller than the sum of its proper divisors (1225479384).

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

689331816 is a wasteful number, since it uses less digits than its factorization.

689331816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191366 (or 3191356 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 689331816 is about 26255.1293274286. The cubic root of 689331816 is about 883.3702612148.

The spelling of 689331816 in words is "six hundred eighty-nine million, three hundred thirty-one thousand, eight hundred sixteen".