687610320 has 40 divisors (see below), whose sum is σ = 2131592736. Its totient is φ = 183362688.

The previous prime is 687610307. The next prime is 687610327. The reversal of 687610320 is 23016786.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687610327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1432282 + ... + 1432761.

Almost surely, 2^687610320 is an apocalyptic number.

687610320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

687610320 is an abundant number, since it is smaller than the sum of its proper divisors (1443982416).

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

687610320 is a wasteful number, since it uses less digits than its factorization.

687610320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865059 (or 2865053 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 687610320 is about 26222.3248397239. The cubic root of 687610320 is about 882.6342895525.

The spelling of 687610320 in words is "six hundred eighty-seven million, six hundred ten thousand, three hundred twenty".