22728666 has 8 divisors (see below), whose sum is σ = 45457344. Its totient is φ = 7576220.

The previous prime is 22728659. The next prime is 22728689. The reversal of 22728666 is 66682722.

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

22728666 is an admirable 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, 1894050 + ... + 1894061.

It is an arithmetic number, because the mean of its divisors is an integer number (5682168).

Almost surely, 2^22728666 is an apocalyptic number.

22728666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22728666 is a wasteful number, since it uses less digits than its factorization.

22728666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3788116.

The product of its digits is 96768, while the sum is 39.

The square root of 22728666 is about 4767.4590716649. The cubic root of 22728666 is about 283.2639556393.

The spelling of 22728666 in words is "twenty-two million, seven hundred twenty-eight thousand, six hundred sixty-six".