689688774 has 12 divisors (see below), whose sum is σ = 1494325716. Its totient is φ = 229896252.

The previous prime is 689688773. The next prime is 689688823. The reversal of 689688774 is 477886986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689688773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19158004 + ... + 19158039.

It is an arithmetic number, because the mean of its divisors is an integer number (124527143).

Almost surely, 2^689688774 is an apocalyptic number.

689688774 is an abundant number, since it is smaller than the sum of its proper divisors (804636942).

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

689688774 is a wasteful number, since it uses less digits than its factorization.

689688774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38316051 (or 38316048 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The square root of 689688774 is about 26261.9263192935. The cubic root of 689688774 is about 883.5227140014.

The spelling of 689688774 in words is "six hundred eighty-nine million, six hundred eighty-eight thousand, seven hundred seventy-four".