687414820 has 12 divisors (see below), whose sum is σ = 1443571164. Its totient is φ = 274965920.

The previous prime is 687414803. The next prime is 687414853. The reversal of 687414820 is 28414786.

It can be written as a sum of positive squares in 2 ways, for example, as 473845824 + 213568996 = 21768^2 + 14614^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17185351 + ... + 17185390.

It is an arithmetic number, because the mean of its divisors is an integer number (120297597).

Almost surely, 2^687414820 is an apocalyptic number.

It is an amenable number.

687414820 is an abundant number, since it is smaller than the sum of its proper divisors (756156344).

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

687414820 is a wasteful number, since it uses less digits than its factorization.

687414820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34370750 (or 34370748 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 687414820 is about 26218.5968350711. The cubic root of 687414820 is about 882.5506320144.

The spelling of 687414820 in words is "six hundred eighty-seven million, four hundred fourteen thousand, eight hundred twenty".