689925228 has 12 divisors (see below), whose sum is σ = 1609825560. Its totient is φ = 229975072.

The previous prime is 689925217. The next prime is 689925233. The reversal of 689925228 is 822529986.

It is a tau number, because it is divible by the number of its divisors (12).

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, 28746873 + ... + 28746896.

It is an arithmetic number, because the mean of its divisors is an integer number (134152130).

Almost surely, 2^689925228 is an apocalyptic number.

It is an amenable number.

689925228 is an abundant number, since it is smaller than the sum of its proper divisors (919900332).

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

689925228 is a wasteful number, since it uses less digits than its factorization.

689925228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57493776 (or 57493774 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 51.

The square root of 689925228 is about 26266.4277738713. The cubic root of 689925228 is about 883.6236719105.

The spelling of 689925228 in words is "six hundred eighty-nine million, nine hundred twenty-five thousand, two hundred twenty-eight".