689421220 has 24 divisors (see below), whose sum is σ = 1448508600. Its totient is φ = 275630592.

The previous prime is 689421211. The next prime is 689421221. The reversal of 689421220 is 22124986.

It can be written as a sum of positive squares in 4 ways, for example, as 291658084 + 397763136 = 17078^2 + 19944^2 .

It is not an unprimeable number, because it can be changed into a prime (689421221) 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, 38716 + ... + 53644.

It is an arithmetic number, because the mean of its divisors is an integer number (60354525).

Almost surely, 2^689421220 is an apocalyptic number.

It is an amenable number.

689421220 is an abundant number, since it is smaller than the sum of its proper divisors (759087380).

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

689421220 is a wasteful number, since it uses less digits than its factorization.

689421220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17247 (or 17245 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 689421220 is about 26256.8318728669. The cubic root of 689421220 is about 883.4084496068.

The spelling of 689421220 in words is "six hundred eighty-nine million, four hundred twenty-one thousand, two hundred twenty".