22911428 has 24 divisors (see below), whose sum is σ = 40822488. Its totient is φ = 11250176.

The previous prime is 22911407. The next prime is 22911431. The reversal of 22911428 is 82411922.

It can be written as a sum of positive squares in 4 ways, for example, as 6927424 + 15984004 = 2632^2 + 3998^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22911428.

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 7 ways as a sum of consecutive naturals, for example, 78050 + ... + 78342.

It is an arithmetic number, because the mean of its divisors is an integer number (1700937).

Almost surely, 2^22911428 is an apocalyptic number.

It is an amenable number.

22911428 is a deficient number, since it is larger than the sum of its proper divisors (17911060).

22911428 is a wasteful number, since it uses less digits than its factorization.

22911428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583 (or 581 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 22911428 is about 4786.5883466202. The cubic root of 22911428 is about 284.0211747751.

The spelling of 22911428 in words is "twenty-two million, nine hundred eleven thousand, four hundred twenty-eight".