689772688 has 40 divisors (see below), whose sum is σ = 1543695840. Its totient is φ = 295088640.

The previous prime is 689772641. The next prime is 689772697. The reversal of 689772688 is 886277986.

It is a super-2 number, since 2×689772688² = 951572722221490688, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112278 + ... + 118261.

It is an arithmetic number, because the mean of its divisors is an integer number (38592396).

Almost surely, 2^689772688 is an apocalyptic number.

689772688 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

689772688 is an abundant number, since it is smaller than the sum of its proper divisors (853923152).

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

689772688 is a wasteful number, since it uses less digits than its factorization.

689772688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230575 (or 230569 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 61.

The square root of 689772688 is about 26263.5239067418. The cubic root of 689772688 is about 883.5585450995.

It can be divided in two parts, 689 and 772688, that added together give a palindrome (773377).

The spelling of 689772688 in words is "six hundred eighty-nine million, seven hundred seventy-two thousand, six hundred eighty-eight".