408840220 has 12 divisors (see below), whose sum is σ = 858564504. Its totient is φ = 163536080.

The previous prime is 408840163. The next prime is 408840221. The reversal of 408840220 is 22048804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408840221) 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 3 ways as a sum of consecutive naturals, for example, 10220986 + ... + 10221025.

It is an arithmetic number, because the mean of its divisors is an integer number (71547042).

Almost surely, 2^408840220 is an apocalyptic number.

It is an amenable number.

408840220 is an abundant number, since it is smaller than the sum of its proper divisors (449724284).

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

408840220 is a wasteful number, since it uses less digits than its factorization.

408840220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20442020 (or 20442018 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 408840220 is about 20219.7977240130. The cubic root of 408840220 is about 742.1947382297.

It can be divided in two parts, 408840 and 220, that added together give a triangular number (409060 = T₉₀₄).

The spelling of 408840220 in words is "four hundred eight million, eight hundred forty thousand, two hundred twenty".