409745020 has 12 divisors (see below), whose sum is σ = 860464584. Its totient is φ = 163898000.

The previous prime is 409744997. The next prime is 409745027. The reversal of 409745020 is 20547904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409745027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10243606 + ... + 10243645.

It is an arithmetic number, because the mean of its divisors is an integer number (71705382).

Almost surely, 2^409745020 is an apocalyptic number.

It is an amenable number.

409745020 is an abundant number, since it is smaller than the sum of its proper divisors (450719564).

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

409745020 is a wasteful number, since it uses less digits than its factorization.

409745020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20487260 (or 20487258 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 409745020 is about 20242.1594697799. The cubic root of 409745020 is about 742.7418492879.

The spelling of 409745020 in words is "four hundred nine million, seven hundred forty-five thousand, twenty".