421084890 has 24 divisors (see below), whose sum is σ = 1094820948. Its totient is φ = 112289280.

The previous prime is 421084861. The next prime is 421084907. The reversal of 421084890 is 98480124.

It can be written as a sum of positive squares in 2 ways, for example, as 359822961 + 61261929 = 18969^2 + 7827^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2339271 + ... + 2339450.

Almost surely, 2^421084890 is an apocalyptic number.

421084890 is an abundant number, since it is smaller than the sum of its proper divisors (673736058).

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

421084890 is a wasteful number, since it uses less digits than its factorization.

421084890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4678734 (or 4678731 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 421084890 is about 20520.3530671380. The cubic root of 421084890 is about 749.5314940639.

The spelling of 421084890 in words is "four hundred twenty-one million, eighty-four thousand, eight hundred ninety".