421835808 has 24 divisors (see below), whose sum is σ = 1107319248. Its totient is φ = 140611904.

The previous prime is 421835803. The next prime is 421835809. The reversal of 421835808 is 808538124.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×421835808² = 355890897822025728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (421835803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2196966 + ... + 2197157.

It is an arithmetic number, because the mean of its divisors is an integer number (46138302).

Almost surely, 2^421835808 is an apocalyptic number.

421835808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

421835808 is an abundant number, since it is smaller than the sum of its proper divisors (685483440).

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

421835808 is a wasteful number, since it uses less digits than its factorization.

421835808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4394136 (or 4394128 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 421835808 is about 20538.6418246193. The cubic root of 421835808 is about 749.9767743919.

The spelling of 421835808 in words is "four hundred twenty-one million, eight hundred thirty-five thousand, eight hundred eight".