689420920 has 16 divisors (see below), whose sum is σ = 1551197160. Its totient is φ = 275768352.

The previous prime is 689420917. The next prime is 689420939. The reversal of 689420920 is 29024986.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 17235523 = 689420920 / (6 + 8 + 9 + 4 + 2 + 0 + 9 + 2 + 0).

It is a congruent number.

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, 8617722 + ... + 8617801.

Almost surely, 2^689420920 is an apocalyptic number.

It is an amenable number.

689420920 is an abundant number, since it is smaller than the sum of its proper divisors (861776240).

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

689420920 is a wasteful number, since it uses less digits than its factorization.

689420920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17235534 (or 17235530 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 689420920 is about 26256.8261600674. The cubic root of 689420920 is about 883.4083214690.

The spelling of 689420920 in words is "six hundred eighty-nine million, four hundred twenty thousand, nine hundred twenty".