22220788 has 6 divisors (see below), whose sum is σ = 38886386. Its totient is φ = 11110392.

The previous prime is 22220777. The next prime is 22220791. The reversal of 22220788 is 88702222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19873764 + 2347024 = 4458^2 + 1532^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777595 + ... + 2777602.

Almost surely, 2^22220788 is an apocalyptic number.

It is an amenable number.

22220788 is a deficient number, since it is larger than the sum of its proper divisors (16665598).

22220788 is a wasteful number, since it uses less digits than its factorization.

22220788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555201 (or 5555199 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 22220788 is about 4713.8930832169. The cubic root of 22220788 is about 281.1381732878.

The spelling of 22220788 in words is "twenty-two million, two hundred twenty thousand, seven hundred eighty-eight".