687393952 has 48 divisors (see below), whose sum is σ = 1578225600. Its totient is φ = 294592704.

The previous prime is 687393943. The next prime is 687393953. The reversal of 687393952 is 259393786.

It is a self number, because there is not a number n which added to its sum of digits gives 687393952.

It is not an unprimeable number, because it can be changed into a prime (687393953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20338 + ... + 42289.

It is an arithmetic number, because the mean of its divisors is an integer number (32879700).

Almost surely, 2^687393952 is an apocalyptic number.

It is an amenable number.

687393952 is an abundant number, since it is smaller than the sum of its proper divisors (890831648).

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

687393952 is an equidigital number, since it uses as much as digits as its factorization.

687393952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62658 (or 62636 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 52.

The square root of 687393952 is about 26218.1988702504. The cubic root of 687393952 is about 882.5417013307.

The spelling of 687393952 in words is "six hundred eighty-seven million, three hundred ninety-three thousand, nine hundred fifty-two".