656383840 has 48 divisors (see below), whose sum is σ = 1772239392. Its totient is φ = 225045504.

The previous prime is 656383831. The next prime is 656383841. The reversal of 656383840 is 48383656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656383841) 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 7 ways as a sum of consecutive naturals, for example, 291909 + ... + 294148.

It is an arithmetic number, because the mean of its divisors is an integer number (36921654).

Almost surely, 2^656383840 is an apocalyptic number.

It is an amenable number.

656383840 is an abundant number, since it is smaller than the sum of its proper divisors (1115855552).

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

656383840 is a wasteful number, since it uses less digits than its factorization.

656383840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586079 (or 586071 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The square root of 656383840 is about 25619.9890710359. The cubic root of 656383840 is about 869.0657342098.

The spelling of 656383840 in words is "six hundred fifty-six million, three hundred eighty-three thousand, eight hundred forty".