656950440 has 32 divisors (see below), whose sum is σ = 1970851680. Its totient is φ = 175186752.

The previous prime is 656950417. The next prime is 656950447. The reversal of 656950440 is 44059656.

It is not an unprimeable number, because it can be changed into a prime (656950447) 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 7 ways as a sum of consecutive naturals, for example, 2737174 + ... + 2737413.

It is an arithmetic number, because the mean of its divisors is an integer number (61589115).

Almost surely, 2^656950440 is an apocalyptic number.

656950440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

656950440 is an abundant number, since it is smaller than the sum of its proper divisors (1313901240).

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

656950440 is a wasteful number, since it uses less digits than its factorization.

656950440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5474601 (or 5474597 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 656950440 is about 25631.0444578445. The cubic root of 656950440 is about 869.3157256513.

The spelling of 656950440 in words is "six hundred fifty-six million, nine hundred fifty thousand, four hundred forty".