656347340 has 24 divisors (see below), whose sum is σ = 1503632592. Its totient is φ = 238671680.

The previous prime is 656347337. The next prime is 656347379. The reversal of 656347340 is 43743656.

It is a junction number, because it is equal to n+sod(n) for n = 656347294 and 656347303.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1491479 + ... + 1491918.

It is an arithmetic number, because the mean of its divisors is an integer number (62651358).

Almost surely, 2^656347340 is an apocalyptic number.

It is an amenable number.

656347340 is an abundant number, since it is smaller than the sum of its proper divisors (847285252).

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

656347340 is a wasteful number, since it uses less digits than its factorization.

656347340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2983417 (or 2983415 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 38.

The square root of 656347340 is about 25619.2767267150. The cubic root of 656347340 is about 869.0496249938.

The spelling of 656347340 in words is "six hundred fifty-six million, three hundred forty-seven thousand, three hundred forty".