22778652 has 48 divisors (see below), whose sum is σ = 57677312. Its totient is φ = 6955200.

The previous prime is 22778647. The next prime is 22778677. The reversal of 22778652 is 25687722.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 22778652.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 23073 + ... + 24039.

Almost surely, 2^22778652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22778652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28838656).

22778652 is an abundant number, since it is smaller than the sum of its proper divisors (34898660).

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

22778652 is a wasteful number, since it uses less digits than its factorization.

22778652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138 (or 1136 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 22778652 is about 4772.6986077061. The cubic root of 22778652 is about 283.4714596031.

The spelling of 22778652 in words is "twenty-two million, seven hundred seventy-eight thousand, six hundred fifty-two".