689394290 has 64 divisors (see below), whose sum is σ = 1424908800. Its totient is φ = 238028544.

The previous prime is 689394287. The next prime is 689394301. The reversal of 689394290 is 92493986.

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, 193364 + ... + 196896.

It is an arithmetic number, because the mean of its divisors is an integer number (22264200).

Almost surely, 2^689394290 is an apocalyptic number.

689394290 is an abundant number, since it is smaller than the sum of its proper divisors (735514510).

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

689394290 is a wasteful number, since it uses less digits than its factorization.

689394290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651.

The product of its (nonzero) digits is 839808, while the sum is 50.

The square root of 689394290 is about 26256.3190489452. The cubic root of 689394290 is about 883.3969469634.

The spelling of 689394290 in words is "six hundred eighty-nine million, three hundred ninety-four thousand, two hundred ninety".