421570320 has 80 divisors (see below), whose sum is σ = 1316374080. Its totient is φ = 111601152.

The previous prime is 421570273. The next prime is 421570339. The reversal of 421570320 is 23075124.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27042 + ... + 39678.

It is an arithmetic number, because the mean of its divisors is an integer number (16454676).

Almost surely, 2^421570320 is an apocalyptic number.

421570320 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 421570320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (658187040).

421570320 is an abundant number, since it is smaller than the sum of its proper divisors (894803760).

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

421570320 is a wasteful number, since it uses less digits than its factorization.

421570320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12792 (or 12786 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 421570320 is about 20532.1776731062. The cubic root of 421570320 is about 749.8194054065.

The spelling of 421570320 in words is "four hundred twenty-one million, five hundred seventy thousand, three hundred twenty".