687883746 has 16 divisors (see below), whose sum is σ = 1500837408. Its totient is φ = 208449600.

The previous prime is 687883739. The next prime is 687883783. The reversal of 687883746 is 647388786.

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, 5211175 + ... + 5211306.

It is an arithmetic number, because the mean of its divisors is an integer number (93802338).

Almost surely, 2^687883746 is an apocalyptic number.

687883746 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

687883746 is an abundant number, since it is smaller than the sum of its proper divisors (812953662).

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

687883746 is a wasteful number, since it uses less digits than its factorization.

687883746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10422497.

The product of its digits is 10838016, while the sum is 57.

The square root of 687883746 is about 26227.5379324862. The cubic root of 687883746 is about 882.7512662638.

The spelling of 687883746 in words is "six hundred eighty-seven million, eight hundred eighty-three thousand, seven hundred forty-six".