409895020 has 24 divisors (see below), whose sum is σ = 888547968. Its totient is φ = 158668800.

The previous prime is 409895011. The next prime is 409895033. The reversal of 409895020 is 20598904.

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, 329941 + ... + 331180.

It is an arithmetic number, because the mean of its divisors is an integer number (37022832).

Almost surely, 2^409895020 is an apocalyptic number.

It is an amenable number.

409895020 is an abundant number, since it is smaller than the sum of its proper divisors (478652948).

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

409895020 is a wasteful number, since it uses less digits than its factorization.

409895020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661161 (or 661159 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 409895020 is about 20245.8642690304. The cubic root of 409895020 is about 742.8324728705.

The spelling of 409895020 in words is "four hundred nine million, eight hundred ninety-five thousand, twenty".