689877644 has 24 divisors (see below), whose sum is σ = 1238137488. Its totient is φ = 336143360.

The previous prime is 689877637. The next prime is 689877647. The reversal of 689877644 is 446778986.

It is not an unprimeable number, because it can be changed into a prime (689877647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188924 + ... + 192540.

It is an arithmetic number, because the mean of its divisors is an integer number (51589062).

Almost surely, 2^689877644 is an apocalyptic number.

It is an amenable number.

689877644 is a deficient number, since it is larger than the sum of its proper divisors (548259844).

689877644 is a wasteful number, since it uses less digits than its factorization.

689877644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4825 (or 4823 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 59.

The square root of 689877644 is about 26265.5219632125. The cubic root of 689877644 is about 883.6033569963.

The spelling of 689877644 in words is "six hundred eighty-nine million, eight hundred seventy-seven thousand, six hundred forty-four".