420042402 has 48 divisors (see below), whose sum is σ = 1010774880. Its totient is φ = 129241008.

The previous prime is 420042391. The next prime is 420042407. The reversal of 420042402 is 204240024.

420042402 is a `hidden beast` number, since 420 + 0 + 4 + 240 + 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 (420042407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13888 + ... + 32139.

It is an arithmetic number, because the mean of its divisors is an integer number (21057810).

Almost surely, 2^420042402 is an apocalyptic number.

420042402 is an abundant number, since it is smaller than the sum of its proper divisors (590732478).

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

420042402 is a wasteful number, since it uses less digits than its factorization.

420042402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46064 (or 46045 counting only the distinct ones).

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

The square root of 420042402 is about 20494.9360086827. The cubic root of 420042402 is about 748.9124397124.

Adding to 420042402 its reverse (204240024), we get a palindrome (624282426).

The spelling of 420042402 in words is "four hundred twenty million, forty-two thousand, four hundred two".