22222988 has 6 divisors (see below), whose sum is σ = 38890236. Its totient is φ = 11111492.

The previous prime is 22222987. The next prime is 22222997. The reversal of 22222988 is 88922222.

It is a super-2 number, since 2×22222988² = 987722391296288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22222987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777870 + ... + 2777877.

It is an arithmetic number, because the mean of its divisors is an integer number (6481706).

Almost surely, 2^22222988 is an apocalyptic number.

It is an amenable number.

22222988 is a deficient number, since it is larger than the sum of its proper divisors (16667248).

22222988 is a wasteful number, since it uses less digits than its factorization.

22222988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555751 (or 5555749 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 22222988 is about 4714.1264302095. The cubic root of 22222988 is about 281.1474511401.

The spelling of 22222988 in words is "twenty-two million, two hundred twenty-two thousand, nine hundred eighty-eight".