656169228 has 96 divisors (see below), whose sum is σ = 1998635520. Its totient is φ = 183539520.

The previous prime is 656169223. The next prime is 656169229. The reversal of 656169228 is 822961656.

656169228 is a `hidden beast` number, since 6 + 5 + 616 + 9 + 2 + 28 = 666.

It is not an unprimeable number, because it can be changed into a prime (656169221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5800 + ... + 36687.

It is an arithmetic number, because the mean of its divisors is an integer number (20819120).

Almost surely, 2^656169228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656169228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (999317760).

656169228 is an abundant number, since it is smaller than the sum of its proper divisors (1342466292).

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

656169228 is a wasteful number, since it uses less digits than its factorization.

656169228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42524 (or 42516 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 656169228 is about 25615.8003583726. The cubic root of 656169228 is about 868.9710069811.

The spelling of 656169228 in words is "six hundred fifty-six million, one hundred sixty-nine thousand, two hundred twenty-eight".