688869074 has 16 divisors (see below), whose sum is σ = 1069965720. Its totient is φ = 332236800.

The previous prime is 688869061. The next prime is 688869089. The reversal of 688869074 is 470968886.

688869074 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 685654225 + 3214849 = 26185^2 + 1793^2 .

It is a super-3 number, since 3×688869074³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 61724 + ... + 72024.

Almost surely, 2^688869074 is an apocalyptic number.

688869074 is a deficient number, since it is larger than the sum of its proper divisors (381096646).

688869074 is a wasteful number, since it uses less digits than its factorization.

688869074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11485.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The square root of 688869074 is about 26246.3154366475. The cubic root of 688869074 is about 883.1725509034.

The spelling of 688869074 in words is "six hundred eighty-eight million, eight hundred sixty-nine thousand, seventy-four".