402444220442 has 64 divisors (see below), whose sum is σ = 668873013120. Its totient is φ = 180084768000.

The previous prime is 402444220427. The next prime is 402444220489. The reversal of 402444220442 is 244022444204.

It is a super-2 number, since 2×402444220442² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402444220399 and 402444220408.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 403654688 + ... + 403655684.

It is an arithmetic number, because the mean of its divisors is an integer number (10451140830).

Almost surely, 2^402444220442 is an apocalyptic number.

402444220442 is a deficient number, since it is larger than the sum of its proper divisors (266428792678).

402444220442 is a wasteful number, since it uses less digits than its factorization.

402444220442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967.

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 402444220442 its reverse (244022444204), we get a palindrome (646466664646).

The spelling of 402444220442 in words is "four hundred two billion, four hundred forty-four million, two hundred twenty thousand, four hundred forty-two".