421008928 has 24 divisors (see below), whose sum is σ = 864900288. Its totient is φ = 201351744.

The previous prime is 421008881. The next prime is 421008949. The reversal of 421008928 is 829800124.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 421008893 and 421008902.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285276 + ... + 286747.

It is an arithmetic number, because the mean of its divisors is an integer number (36037512).

Almost surely, 2^421008928 is an apocalyptic number.

It is an amenable number.

421008928 is an abundant number, since it is smaller than the sum of its proper divisors (443891360).

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

421008928 is a wasteful number, since it uses less digits than its factorization.

421008928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572056 (or 572048 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 421008928 is about 20518.5020895776. The cubic root of 421008928 is about 749.4864205433.

The spelling of 421008928 in words is "four hundred twenty-one million, eight thousand, nine hundred twenty-eight".