402042222 has 24 divisors (see below), whose sum is σ = 894635976. Its totient is φ = 130391856.

The previous prime is 402042169. The next prime is 402042227. The reversal of 402042222 is 222240204.

402042222 is a `hidden beast` number, since 402 + 0 + 42 + 222 = 666.

It is a super-4 number, since 4×402042222⁴ (a number of 36 digits) contains 4444 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 402042195 and 402042204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402042227) 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, 301168 + ... + 302499.

It is an arithmetic number, because the mean of its divisors is an integer number (37276499).

Almost surely, 2^402042222 is an apocalyptic number.

402042222 is an abundant number, since it is smaller than the sum of its proper divisors (492593754).

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

402042222 is a wasteful number, since it uses less digits than its factorization.

402042222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603712 (or 603709 counting only the distinct ones).

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

The square root of 402042222 is about 20050.9905490976. The cubic root of 402042222 is about 738.0581067783.

Adding to 402042222 its reverse (222240204), we get a palindrome (624282426).

The spelling of 402042222 in words is "four hundred two million, forty-two thousand, two hundred twenty-two".