656401360 has 80 divisors (see below), whose sum is σ = 1613289600. Its totient is φ = 247684608.

The previous prime is 656401357. The next prime is 656401367. The reversal of 656401360 is 63104656.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656401367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420261 + ... + 421819.

It is an arithmetic number, because the mean of its divisors is an integer number (20166120).

Almost surely, 2^656401360 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 656401360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (806644800).

656401360 is an abundant number, since it is smaller than the sum of its proper divisors (956888240).

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

656401360 is a wasteful number, since it uses less digits than its factorization.

656401360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868 (or 1862 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 656401360 is about 25620.3309892749. The cubic root of 656401360 is about 869.0734664214.

The spelling of 656401360 in words is "six hundred fifty-six million, four hundred one thousand, three hundred sixty".