22728646 has 8 divisors (see below), whose sum is σ = 35575344. Its totient is φ = 10870200.

The previous prime is 22728613. The next prime is 22728653. The reversal of 22728646 is 64682722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247005 + ... + 247096.

It is an arithmetic number, because the mean of its divisors is an integer number (4446918).

Almost surely, 2^22728646 is an apocalyptic number.

22728646 is a deficient number, since it is larger than the sum of its proper divisors (12846698).

22728646 is a wasteful number, since it uses less digits than its factorization.

22728646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494126.

The product of its digits is 64512, while the sum is 37.

The square root of 22728646 is about 4767.4569741110. The cubic root of 22728646 is about 283.2638725536.

The spelling of 22728646 in words is "twenty-two million, seven hundred twenty-eight thousand, six hundred forty-six".