408908920 has 48 divisors (see below), whose sum is σ = 1070261640. Its totient is φ = 140196672.

The previous prime is 408908917. The next prime is 408908933. The reversal of 408908920 is 29809804.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102354 + ... + 106273.

Almost surely, 2^408908920 is an apocalyptic number.

408908920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

408908920 is an abundant number, since it is smaller than the sum of its proper divisors (661352720).

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

408908920 is a wasteful number, since it uses less digits than its factorization.

408908920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208652 (or 208641 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 408908920 is about 20221.4964827037. The cubic root of 408908920 is about 742.2363077886.

The spelling of 408908920 in words is "four hundred eight million, nine hundred eight thousand, nine hundred twenty".