421028208 has 30 divisors (see below), whose sum is σ = 1178294624. Its totient is φ = 140342688.

The previous prime is 421028191. The next prime is 421028213. The reversal of 421028208 is 802820124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1461760 + ... + 1462047.

Almost surely, 2^421028208 is an apocalyptic number.

421028208 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

421028208 is an abundant number, since it is smaller than the sum of its proper divisors (757266416).

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

421028208 is a wasteful number, since it uses less digits than its factorization.

421028208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923821 (or 2923812 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 421028208 is about 20518.9719040697. The cubic root of 421028208 is about 749.4978612172.

The spelling of 421028208 in words is "four hundred twenty-one million, twenty-eight thousand, two hundred eight".