22419728 has 10 divisors (see below), whose sum is σ = 43438254. Its totient is φ = 11209856.

The previous prime is 22419721. The next prime is 22419739. The reversal of 22419728 is 82791422.

It can be written as a sum of positive squares in only one way, i.e., 21270544 + 1149184 = 4612^2 + 1072^2 .

It is not an unprimeable number, because it can be changed into a prime (22419721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700601 + ... + 700632.

Almost surely, 2^22419728 is an apocalyptic number.

It is an amenable number.

22419728 is a deficient number, since it is larger than the sum of its proper divisors (21018526).

22419728 is a wasteful number, since it uses less digits than its factorization.

22419728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401241 (or 1401235 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 22419728 is about 4734.9475181886. The cubic root of 22419728 is about 281.9746804221.

The spelling of 22419728 in words is "twenty-two million, four hundred nineteen thousand, seven hundred twenty-eight".