421606928 has 40 divisors (see below), whose sum is σ = 855748800. Its totient is φ = 200841344.

The previous prime is 421606921. The next prime is 421606943. The reversal of 421606928 is 829606124.

It is a junction number, because it is equal to n+sod(n) for n = 421606891 and 421606900.

It is not an unprimeable number, because it can be changed into a prime (421606921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96863 + ... + 101121.

It is an arithmetic number, because the mean of its divisors is an integer number (21393720).

Almost surely, 2^421606928 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 421606928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (427874400).

421606928 is an abundant number, since it is smaller than the sum of its proper divisors (434141872).

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

421606928 is a wasteful number, since it uses less digits than its factorization.

421606928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4559 (or 4553 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 421606928 is about 20533.0691324994. The cubic root of 421606928 is about 749.8411088590.

The spelling of 421606928 in words is "four hundred twenty-one million, six hundred six thousand, nine hundred twenty-eight".