689812944 has 60 divisors (see below), whose sum is σ = 1893045504. Its totient is φ = 216407552.

The previous prime is 689812943. The next prime is 689812951. The reversal of 689812944 is 449218986.

689812944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689812943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10992 + ... + 38735.

Almost surely, 2^689812944 is an apocalyptic number.

It is an amenable number.

689812944 is an abundant number, since it is smaller than the sum of its proper divisors (1203232560).

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

689812944 is a wasteful number, since it uses less digits than its factorization.

689812944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49772 (or 49749 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 689812944 is about 26264.2902816733. The cubic root of 689812944 is about 883.5757332938.

The spelling of 689812944 in words is "six hundred eighty-nine million, eight hundred twelve thousand, nine hundred forty-four".