421109856 has 72 divisors (see below), whose sum is σ = 1267988904. Its totient is φ = 132111360.

The previous prime is 421109833. The next prime is 421109867. The reversal of 421109856 is 658901124.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 421109856.

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, 38110 + ... + 47901.

It is an arithmetic number, because the mean of its divisors is an integer number (17610957).

Almost surely, 2^421109856 is an apocalyptic number.

It is an amenable number.

421109856 is an abundant number, since it is smaller than the sum of its proper divisors (846879048).

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

421109856 is a wasteful number, since it uses less digits than its factorization.

421109856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86044 (or 86033 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 421109856 is about 20520.9613809880. The cubic root of 421109856 is about 749.5463069388.

The spelling of 421109856 in words is "four hundred twenty-one million, one hundred nine thousand, eight hundred fifty-six".