689282944 has 32 divisors (see below), whose sum is σ = 1569351600. Its totient is φ = 295406592.

The previous prime is 689282921. The next prime is 689282977. The reversal of 689282944 is 449282986.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×689282944² = 950221953778614272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 689282891 and 689282900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383749 + ... + 385540.

Almost surely, 2^689282944 is an apocalyptic number.

689282944 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

689282944 is an abundant number, since it is smaller than the sum of its proper divisors (880068656).

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

689282944 is an equidigital number, since it uses as much as digits as its factorization.

689282944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769310 (or 769298 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 52.

The square root of 689282944 is about 26254.1985975577. The cubic root of 689282944 is about 883.3493844320.

The spelling of 689282944 in words is "six hundred eighty-nine million, two hundred eighty-two thousand, nine hundred forty-four".