689312544 has 24 divisors (see below), whose sum is σ = 1809445680. Its totient is φ = 229770816.

The previous prime is 689312527. The next prime is 689312557. The reversal of 689312544 is 445213986.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 689312496 and 689312505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3590074 + ... + 3590265.

It is an arithmetic number, because the mean of its divisors is an integer number (75393570).

Almost surely, 2^689312544 is an apocalyptic number.

It is an amenable number.

689312544 is an abundant number, since it is smaller than the sum of its proper divisors (1120133136).

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

689312544 is a wasteful number, since it uses less digits than its factorization.

689312544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7180352 (or 7180344 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 689312544 is about 26254.7623108647. The cubic root of 689312544 is about 883.3620288609.

The spelling of 689312544 in words is "six hundred eighty-nine million, three hundred twelve thousand, five hundred forty-four".