409645560 has 64 divisors (see below), whose sum is σ = 1232146080. Its totient is φ = 108953600.

The previous prime is 409645547. The next prime is 409645609. The reversal of 409645560 is 65546904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43864 + ... + 52376.

Almost surely, 2^409645560 is an apocalyptic number.

409645560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

409645560 is an abundant number, since it is smaller than the sum of its proper divisors (822500520).

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

409645560 is a wasteful number, since it uses less digits than its factorization.

409645560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8928 (or 8924 counting only the distinct ones).

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

The square root of 409645560 is about 20239.7025669845. The cubic root of 409645560 is about 742.6817476159.

The spelling of 409645560 in words is "four hundred nine million, six hundred forty-five thousand, five hundred sixty".