656459380 has 12 divisors (see below), whose sum is σ = 1378564740. Its totient is φ = 262583744.

The previous prime is 656459359. The next prime is 656459381. The reversal of 656459380 is 83954656.

It can be written as a sum of positive squares in 2 ways, for example, as 208629136 + 447830244 = 14444^2 + 21162^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 656459380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656459381) 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 3 ways as a sum of consecutive naturals, for example, 16411465 + ... + 16411504.

It is an arithmetic number, because the mean of its divisors is an integer number (114880395).

Almost surely, 2^656459380 is an apocalyptic number.

It is an amenable number.

656459380 is an abundant number, since it is smaller than the sum of its proper divisors (722105360).

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

656459380 is a wasteful number, since it uses less digits than its factorization.

656459380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32822978 (or 32822976 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The square root of 656459380 is about 25621.4632681274. The cubic root of 656459380 is about 869.0990717700.

The spelling of 656459380 in words is "six hundred fifty-six million, four hundred fifty-nine thousand, three hundred eighty".