689585390 has 64 divisors (see below), whose sum is σ = 1391040000. Its totient is φ = 244408320.

The previous prime is 689585389. The next prime is 689585401. The reversal of 689585390 is 93585986.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 551486 + ... + 552734.

It is an arithmetic number, because the mean of its divisors is an integer number (21735000).

Almost surely, 2^689585390 is an apocalyptic number.

689585390 is an abundant number, since it is smaller than the sum of its proper divisors (701454610).

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

689585390 is a wasteful number, since it uses less digits than its factorization.

689585390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437.

The product of its (nonzero) digits is 2332800, while the sum is 53.

The square root of 689585390 is about 26259.9579207584. The cubic root of 689585390 is about 883.4785652587.

The spelling of 689585390 in words is "six hundred eighty-nine million, five hundred eighty-five thousand, three hundred ninety".