408920440 has 32 divisors (see below), whose sum is σ = 937435680. Its totient is φ = 160481152.

The previous prime is 408920423. The next prime is 408920441. The reversal of 408920440 is 44029804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408920441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94324 + ... + 98563.

It is an arithmetic number, because the mean of its divisors is an integer number (29294865).

Almost surely, 2^408920440 is an apocalyptic number.

408920440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

408920440 is an abundant number, since it is smaller than the sum of its proper divisors (528515240).

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

408920440 is a wasteful number, since it uses less digits than its factorization.

408920440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192951 (or 192947 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 408920440 is about 20221.7813260850. The cubic root of 408920440 is about 742.2432779487.

The spelling of 408920440 in words is "four hundred eight million, nine hundred twenty thousand, four hundred forty".