687494892 has 72 divisors (see below), whose sum is σ = 1975854384. Its totient is φ = 184869888.

The previous prime is 687494837. The next prime is 687494903. The reversal of 687494892 is 298494786.

It is a super-3 number, since 3×687494892³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24393 + ... + 44384.

It is an arithmetic number, because the mean of its divisors is an integer number (27442422).

Almost surely, 2^687494892 is an apocalyptic number.

It is an amenable number.

687494892 is an abundant number, since it is smaller than the sum of its proper divisors (1288359492).

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

687494892 is a wasteful number, since it uses less digits than its factorization.

687494892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68815 (or 68806 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 57.

The square root of 687494892 is about 26220.1237983347. The cubic root of 687494892 is about 882.5848980056.

The spelling of 687494892 in words is "six hundred eighty-seven million, four hundred ninety-four thousand, eight hundred ninety-two".