22222764 has 36 divisors (see below), whose sum is σ = 56591080. Its totient is φ = 7352640.

The previous prime is 22222747. The next prime is 22222769. The reversal of 22222764 is 46722222.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (22222769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2784 + ... + 7224.

Almost surely, 2^22222764 is an apocalyptic number.

It is an amenable number.

22222764 is an abundant number, since it is smaller than the sum of its proper divisors (34368316).

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

22222764 is a wasteful number, since it uses less digits than its factorization.

22222764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4590 (or 4585 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 22222764 is about 4714.1026717712. The cubic root of 22222764 is about 281.1465065141.

Adding to 22222764 its reverse (46722222), we get a palindrome (68944986).

The spelling of 22222764 in words is "twenty-two million, two hundred twenty-two thousand, seven hundred sixty-four".