22778833 has 24 divisors (see below), whose sum is σ = 29672640. Its totient is φ = 16968000.

The previous prime is 22778813. The next prime is 22778837. The reversal of 22778833 is 33887722.

It is not a de Polignac number, because 22778833 - 2¹³ = 22770641 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22778837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 225483 + ... + 225583.

It is an arithmetic number, because the mean of its divisors is an integer number (1236360).

Almost surely, 2^22778833 is an apocalyptic number.

It is an amenable number.

22778833 is a deficient number, since it is larger than the sum of its proper divisors (6893807).

22778833 is a wasteful number, since it uses less digits than its factorization.

22778833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 148 counting only the distinct ones).

The product of its digits is 112896, while the sum is 40.

The square root of 22778833 is about 4772.7175696871. The cubic root of 22778833 is about 283.4722104259.

Subtracting 22778833 from its reverse (33887722), we obtain a square (11108889 = 3333²).

The spelling of 22778833 in words is "twenty-two million, seven hundred seventy-eight thousand, eight hundred thirty-three".