689661200 has 30 divisors (see below), whose sum is σ = 1656911994. Its totient is φ = 275864320.

The previous prime is 689661179. The next prime is 689661211. The reversal of 689661200 is 2166986.

It can be written as a sum of positive squares in 3 ways, for example, as 221890816 + 467770384 = 14896^2 + 21628^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 861677 + ... + 862476.

Almost surely, 2^689661200 is an apocalyptic number.

It is an amenable number.

689661200 is an abundant number, since it is smaller than the sum of its proper divisors (967250794).

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

689661200 is a wasteful number, since it uses less digits than its factorization.

689661200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724171 (or 1724160 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 689661200 is about 26261.4013335161. The cubic root of 689661200 is about 883.5109393281.

The spelling of 689661200 in words is "six hundred eighty-nine million, six hundred sixty-one thousand, two hundred".