22778552 has 32 divisors (see below), whose sum is σ = 44945280. Its totient is φ = 10807680.

The previous prime is 22778551. The next prime is 22778563. The reversal of 22778552 is 25587722.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22778551) 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 7 ways as a sum of consecutive naturals, for example, 12278 + ... + 14010.

It is an arithmetic number, because the mean of its divisors is an integer number (1404540).

Almost surely, 2^22778552 is an apocalyptic number.

It is an amenable number.

22778552 is a deficient number, since it is larger than the sum of its proper divisors (22166728).

22778552 is a wasteful number, since it uses less digits than its factorization.

22778552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823 (or 1819 counting only the distinct ones).

The product of its digits is 78400, while the sum is 38.

The square root of 22778552 is about 4772.6881314412. The cubic root of 22778552 is about 283.4710447821.

The spelling of 22778552 in words is "twenty-two million, seven hundred seventy-eight thousand, five hundred fifty-two".