420204402 has 32 divisors (see below), whose sum is σ = 988718400. Its totient is φ = 131828544.

The previous prime is 420204401. The next prime is 420204427. The reversal of 420204402 is 204402024.

420204402 is a `hidden beast` number, since 420 + 204 + 40 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (420204401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227952 + ... + 229787.

It is an arithmetic number, because the mean of its divisors is an integer number (30897450).

Almost surely, 2^420204402 is an apocalyptic number.

420204402 is an abundant number, since it is smaller than the sum of its proper divisors (568513998).

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

420204402 is a wasteful number, since it uses less digits than its factorization.

420204402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457767 (or 457761 counting only the distinct ones).

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

The square root of 420204402 is about 20498.8878234894. The cubic root of 420204402 is about 749.0087063598.

Adding to 420204402 its reverse (204402024), we get a palindrome (624606426).

The spelling of 420204402 in words is "four hundred twenty million, two hundred four thousand, four hundred two".