402222042 has 24 divisors (see below), whose sum is σ = 895036116. Its totient is φ = 130450176.

The previous prime is 402222019. The next prime is 402222049. The reversal of 402222042 is 240222204.

402222042 is a `hidden beast` number, since 402 + 2 + 220 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 400760361 + 1461681 = 20019^2 + 1209^2 .

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 (402222049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 301303 + ... + 302634.

Almost surely, 2^402222042 is an apocalyptic number.

402222042 is an abundant number, since it is smaller than the sum of its proper divisors (492814074).

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

402222042 is a wasteful number, since it uses less digits than its factorization.

402222042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603982 (or 603979 counting only the distinct ones).

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

The square root of 402222042 is about 20055.4741155626. The cubic root of 402222042 is about 738.1681265886.

Adding to 402222042 its reverse (240222204), we get a palindrome (642444246).

It can be divided in two parts, 40222204 and 2, that multiplied together give a palindrome (80444408).

The spelling of 402222042 in words is "four hundred two million, two hundred twenty-two thousand, forty-two".