656478328 has 128 divisors (see below), whose sum is σ = 1466449920. Its totient is φ = 272511360.

The previous prime is 656478323. The next prime is 656478349. The reversal of 656478328 is 823874656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656478323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6373525 + ... + 6373627.

It is an arithmetic number, because the mean of its divisors is an integer number (11456640).

Almost surely, 2^656478328 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 656478328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733224960).

656478328 is an abundant number, since it is smaller than the sum of its proper divisors (809971592).

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

656478328 is a wasteful number, since it uses less digits than its factorization.

656478328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 253 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 49.

The square root of 656478328 is about 25621.8330335673. The cubic root of 656478328 is about 869.1074335622.

The spelling of 656478328 in words is "six hundred fifty-six million, four hundred seventy-eight thousand, three hundred twenty-eight".