689020992 has 280 divisors, whose sum is σ = 2288084832. Its totient is φ = 203212800.

The previous prime is 689020961. The next prime is 689021017. The reversal of 689020992 is 299020986.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2451892 + ... + 2452172.

Almost surely, 2^689020992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689020992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1144042416).

689020992 is an abundant number, since it is smaller than the sum of its proper divisors (1599063840).

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

689020992 is a wasteful number, since it uses less digits than its factorization.

689020992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 689020992 is about 26249.2093595217. The cubic root of 689020992 is about 883.2374688735.

The spelling of 689020992 in words is "six hundred eighty-nine million, twenty thousand, nine hundred ninety-two".