689777808 has 40 divisors (see below), whose sum is σ = 1803405408. Its totient is φ = 227154432.

The previous prime is 689777743. The next prime is 689777821. The reversal of 689777808 is 808777986.

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, 82585 + ... + 90552.

Almost surely, 2^689777808 is an apocalyptic number.

It is an amenable number.

689777808 is an abundant number, since it is smaller than the sum of its proper divisors (1113627600).

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

689777808 is a wasteful number, since it uses less digits than its factorization.

689777808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173231 (or 173225 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 60.

The square root of 689777808 is about 26263.6213801524. The cubic root of 689777808 is about 883.5607312345.

The spelling of 689777808 in words is "six hundred eighty-nine million, seven hundred seventy-seven thousand, eight hundred eight".