688442384 has 40 divisors (see below), whose sum is σ = 1559870400. Its totient is φ = 288183168.

The previous prime is 688442347. The next prime is 688442411. The reversal of 688442384 is 483244886.

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, 66659 + ... + 76290.

It is an arithmetic number, because the mean of its divisors is an integer number (38996760).

Almost surely, 2^688442384 is an apocalyptic number.

It is an amenable number.

688442384 is an abundant number, since it is smaller than the sum of its proper divisors (871428016).

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

688442384 is a wasteful number, since it uses less digits than its factorization.

688442384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143007 (or 143001 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 47.

The square root of 688442384 is about 26238.1856080027. The cubic root of 688442384 is about 882.9901656275.

The spelling of 688442384 in words is "six hundred eighty-eight million, four hundred forty-two thousand, three hundred eighty-four".