655760440 has 32 divisors (see below), whose sum is σ = 1477856160. Its totient is φ = 261878400.

The previous prime is 655760419. The next prime is 655760447. The reversal of 655760440 is 44067556.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 655760440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655760447) 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 7 ways as a sum of consecutive naturals, for example, 12250 + ... + 38230.

It is an arithmetic number, because the mean of its divisors is an integer number (46183005).

Almost surely, 2^655760440 is an apocalyptic number.

It is an amenable number.

655760440 is an abundant number, since it is smaller than the sum of its proper divisors (822095720).

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

655760440 is a wasteful number, since it uses less digits than its factorization.

655760440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26623 (or 26619 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 655760440 is about 25607.8198993979. The cubic root of 655760440 is about 868.7905155785.

The spelling of 655760440 in words is "six hundred fifty-five million, seven hundred sixty thousand, four hundred forty".