689269824 has 70 divisors (see below), whose sum is σ = 2043227054. Its totient is φ = 229754880.

The previous prime is 689269813. The next prime is 689269831. The reversal of 689269824 is 428962986.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 581774400 + 107495424 = 24120^2 + 10368^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

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 9 ways as a sum of consecutive naturals, for example, 61297 + ... + 71664.

Almost surely, 2^689269824 is an apocalyptic number.

689269824 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

689269824 is an abundant number, since it is smaller than the sum of its proper divisors (1353957230).

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

689269824 is a wasteful number, since it uses less digits than its factorization.

689269824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132985 (or 132966 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 689269824 is about 26253.9487315718. The cubic root of 689269824 is about 883.3437797586.

The spelling of 689269824 in words is "six hundred eighty-nine million, two hundred sixty-nine thousand, eight hundred twenty-four".