687472812 has 48 divisors (see below), whose sum is σ = 1919443680. Its totient is φ = 211529664.

The previous prime is 687472787. The next prime is 687472813. The reversal of 687472812 is 218274786.

It is not an unprimeable number, because it can be changed into a prime (687472813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243423 + ... + 246230.

It is an arithmetic number, because the mean of its divisors is an integer number (39988410).

Almost surely, 2^687472812 is an apocalyptic number.

It is an amenable number.

687472812 is an abundant number, since it is smaller than the sum of its proper divisors (1231970868).

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

687472812 is a wasteful number, since it uses less digits than its factorization.

687472812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489679 (or 489671 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 687472812 is about 26219.7027443104. The cubic root of 687472812 is about 882.5754493617.

The spelling of 687472812 in words is "six hundred eighty-seven million, four hundred seventy-two thousand, eight hundred twelve".