688880894 has 16 divisors (see below), whose sum is σ = 1114728048. Its totient is φ = 317396352.

The previous prime is 688880849. The next prime is 688880921. The reversal of 688880894 is 498088886.

It is a super-2 number, since 2×688880894² = 949113772236478472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7307 + ... + 37830.

It is an arithmetic number, because the mean of its divisors is an integer number (69670503).

Almost surely, 2^688880894 is an apocalyptic number.

688880894 is a deficient number, since it is larger than the sum of its proper divisors (425847154).

688880894 is a wasteful number, since it uses less digits than its factorization.

688880894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45739.

The product of its (nonzero) digits is 7077888, while the sum is 59.

The square root of 688880894 is about 26246.5406101452. The cubic root of 688880894 is about 883.1776021970.

The spelling of 688880894 in words is "six hundred eighty-eight million, eight hundred eighty thousand, eight hundred ninety-four".