22728719 has 8 divisors (see below), whose sum is σ = 25074672. Its totient is φ = 20468160.

The previous prime is 22728703. The next prime is 22728757. The reversal of 22728719 is 91782722.

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

It is a cyclic number.

It is not a de Polignac number, because 22728719 - 2⁴ = 22728703 is a prime.

It is a super-2 number, since 2×22728719² = 1033189334761922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22728799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20789 + ... + 21854.

It is an arithmetic number, because the mean of its divisors is an integer number (3134334).

Almost surely, 2^22728719 is an apocalyptic number.

22728719 is a deficient number, since it is larger than the sum of its proper divisors (2345953).

22728719 is a wasteful number, since it uses less digits than its factorization.

22728719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42697.

The product of its digits is 28224, while the sum is 38.

The square root of 22728719 is about 4767.4646301782. The cubic root of 22728719 is about 283.2641758162.

The spelling of 22728719 in words is "twenty-two million, seven hundred twenty-eight thousand, seven hundred nineteen".