421620992 has 72 divisors (see below), whose sum is σ = 913422720. Its totient is φ = 193075200.

The previous prime is 421620911. The next prime is 421621003. The reversal of 421620992 is 299026124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502109 + ... + 502947.

Almost surely, 2^421620992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421620992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456711360).

421620992 is an abundant number, since it is smaller than the sum of its proper divisors (491801728).

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

421620992 is a wasteful number, since it uses less digits than its factorization.

421620992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 421620992 is about 20533.4116015824. The cubic root of 421620992 is about 749.8494465210.

The spelling of 421620992 in words is "four hundred twenty-one million, six hundred twenty thousand, nine hundred ninety-two".