22124778 has 32 divisors (see below), whose sum is σ = 50164800. Its totient is φ = 6448896.

The previous prime is 22124771. The next prime is 22124783. The reversal of 22124778 is 87742122.

It is not an unprimeable number, because it can be changed into a prime (22124771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5983 + ... + 8946.

It is an arithmetic number, because the mean of its divisors is an integer number (1567650).

Almost surely, 2^22124778 is an apocalyptic number.

22124778 is an abundant number, since it is smaller than the sum of its proper divisors (28040022).

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

22124778 is a wasteful number, since it uses less digits than its factorization.

22124778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14966.

The product of its digits is 12544, while the sum is 33.

The square root of 22124778 is about 4703.6983321637. The cubic root of 22124778 is about 280.7326814461.

The spelling of 22124778 in words is "twenty-two million, one hundred twenty-four thousand, seven hundred seventy-eight".