42222644 has 12 divisors (see below), whose sum is σ = 73943268. Its totient is φ = 21096000.

The previous prime is 42222623. The next prime is 42222659. The reversal of 42222644 is 44622224.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11641744 + 30580900 = 3412^2 + 5530^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4274 + ... + 10134.

It is an arithmetic number, because the mean of its divisors is an integer number (6161939).

Almost surely, 2^42222644 is an apocalyptic number.

It is an amenable number.

42222644 is a deficient number, since it is larger than the sum of its proper divisors (31720624).

42222644 is a wasteful number, since it uses less digits than its factorization.

42222644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7666 (or 7664 counting only the distinct ones).

The product of its digits is 6144, while the sum is 26.

The square root of 42222644 is about 6497.8953515735. The cubic root of 42222644 is about 348.2158017639.

Adding to 42222644 its reverse (44622224), we get a palindrome (86844868).

The spelling of 42222644 in words is "forty-two million, two hundred twenty-two thousand, six hundred forty-four".