687084220 has 24 divisors (see below), whose sum is σ = 1443423744. Its totient is φ = 274729536.

The previous prime is 687084199. The next prime is 687084239. The reversal of 687084220 is 22480786.

It is a self number, because there is not a number n which added to its sum of digits gives 687084220.

It is a congruent number.

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, 68869 + ... + 78211.

It is an arithmetic number, because the mean of its divisors is an integer number (60142656).

Almost surely, 2^687084220 is an apocalyptic number.

It is an amenable number.

687084220 is an abundant number, since it is smaller than the sum of its proper divisors (756339524).

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

687084220 is a wasteful number, since it uses less digits than its factorization.

687084220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13029 (or 13027 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 687084220 is about 26212.2913916353. The cubic root of 687084220 is about 882.4091269546.

The spelling of 687084220 in words is "six hundred eighty-seven million, eighty-four thousand, two hundred twenty".