420022404 has 18 divisors (see below), whose sum is σ = 1061723390. Its totient is φ = 140007456.

The previous prime is 420022391. The next prime is 420022489. The reversal of 420022404 is 404220024.

420022404 is a `hidden beast` number, since 420 + 0 + 2 + 240 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 367488900 + 52533504 = 19170^2 + 7248^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5833609 + ... + 5833680.

Almost surely, 2^420022404 is an apocalyptic number.

It is an amenable number.

420022404 is an abundant number, since it is smaller than the sum of its proper divisors (641700986).

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

420022404 is a wasteful number, since it uses less digits than its factorization.

420022404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11667299 (or 11667294 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 420022404 is about 20494.4481262609. The cubic root of 420022404 is about 748.9005544134.

Adding to 420022404 its reverse (404220024), we get a palindrome (824242428).

The spelling of 420022404 in words is "four hundred twenty million, twenty-two thousand, four hundred four".