421811880 has 128 divisors (see below), whose sum is σ = 1450310400. Its totient is φ = 96141312.

The previous prime is 421811879. The next prime is 421811911. The reversal of 421811880 is 88118124.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 548136 + ... + 548904.

It is an arithmetic number, because the mean of its divisors is an integer number (11330550).

Almost surely, 2^421811880 is an apocalyptic number.

421811880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421811880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725155200).

421811880 is an abundant number, since it is smaller than the sum of its proper divisors (1028498520).

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

421811880 is a wasteful number, since it uses less digits than its factorization.

421811880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443 (or 1439 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 33.

The square root of 421811880 is about 20538.0593046179. The cubic root of 421811880 is about 749.9625936899.

The spelling of 421811880 in words is "four hundred twenty-one million, eight hundred eleven thousand, eight hundred eighty".