409499520 has 64 divisors (see below), whose sum is σ = 1305285840. Its totient is φ = 109199360.

The previous prime is 409499483. The next prime is 409499537. The reversal of 409499520 is 25994904.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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, 104721 + ... + 108560.

Almost surely, 2^409499520 is an apocalyptic number.

409499520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

409499520 is an abundant number, since it is smaller than the sum of its proper divisors (895786320).

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

409499520 is a wasteful number, since it uses less digits than its factorization.

409499520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213303 (or 213291 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 409499520 is about 20236.0944848555. The cubic root of 409499520 is about 742.5934809577.

The spelling of 409499520 in words is "four hundred nine million, four hundred ninety-nine thousand, five hundred twenty".