22728465 has 32 divisors (see below), whose sum is σ = 42537600. Its totient is φ = 11482560.

The previous prime is 22728457. The next prime is 22728491. The reversal of 22728465 is 56482722.

It is not a de Polignac number, because 22728465 - 2³ = 22728457 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 1866 + ... + 6995.

It is an arithmetic number, because the mean of its divisors is an integer number (1329300).

Almost surely, 2^22728465 is an apocalyptic number.

It is an amenable number.

22728465 is a deficient number, since it is larger than the sum of its proper divisors (19809135).

22728465 is a wasteful number, since it uses less digits than its factorization.

22728465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8894 (or 8888 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 22728465 is about 4767.4379912066. The cubic root of 22728465 is about 283.2631206259.

The spelling of 22728465 in words is "twenty-two million, seven hundred twenty-eight thousand, four hundred sixty-five".