22776636 has 12 divisors (see below), whose sum is σ = 53145512. Its totient is φ = 7592208.

The previous prime is 22776631. The next prime is 22776643. The reversal of 22776636 is 63667722.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 22776594 and 22776603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22776631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 949015 + ... + 949038.

Almost surely, 2^22776636 is an apocalyptic number.

It is an amenable number.

22776636 is an abundant number, since it is smaller than the sum of its proper divisors (30368876).

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

22776636 is a wasteful number, since it uses less digits than its factorization.

22776636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898060 (or 1898058 counting only the distinct ones).

The product of its digits is 127008, while the sum is 39.

The square root of 22776636 is about 4772.4874017644. The cubic root of 22776636 is about 283.4630965778.

The spelling of 22776636 in words is "twenty-two million, seven hundred seventy-six thousand, six hundred thirty-six".