689401044 has 60 divisors (see below), whose sum is σ = 1804702900. Its totient is φ = 229485312.

The previous prime is 689401007. The next prime is 689401049. The reversal of 689401044 is 440104986.

It is a happy number.

689401044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 91011600 + 598389444 = 9540^2 + 24462^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689401049) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 462252 + ... + 463740.

Almost surely, 2^689401044 is an apocalyptic number.

It is an amenable number.

689401044 is an abundant number, since it is smaller than the sum of its proper divisors (1115301856).

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

689401044 is a wasteful number, since it uses less digits than its factorization.

689401044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2934 (or 2923 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 689401044 is about 26256.4476652879. The cubic root of 689401044 is about 883.3998318357.

The spelling of 689401044 in words is "six hundred eighty-nine million, four hundred one thousand, forty-four".