402222344 has 64 divisors (see below), whose sum is σ = 833500800. Its totient is φ = 181310976.

The previous prime is 402222323. The next prime is 402222347. The reversal of 402222344 is 443222204.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (402222347) 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, 228572 + ... + 230324.

It is an arithmetic number, because the mean of its divisors is an integer number (13023450).

Almost surely, 2^402222344 is an apocalyptic number.

It is an amenable number.

402222344 is an abundant number, since it is smaller than the sum of its proper divisors (431278456).

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

402222344 is a wasteful number, since it uses less digits than its factorization.

402222344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854 (or 1850 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 402222344 is about 20055.4816446776. The cubic root of 402222344 is about 738.1683113345.

Adding to 402222344 its reverse (443222204), we get a palindrome (845444548).

The spelling of 402222344 in words is "four hundred two million, two hundred twenty-two thousand, three hundred forty-four".