22728072 has 32 divisors (see below), whose sum is σ = 58032000. Its totient is φ = 7414464.

The previous prime is 22728061. The next prime is 22728073. The reversal of 22728072 is 27082722.

It is not an unprimeable number, because it can be changed into a prime (22728073) 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, 8947 + ... + 11202.

It is an arithmetic number, because the mean of its divisors is an integer number (1813500).

Almost surely, 2^22728072 is an apocalyptic number.

It is an amenable number.

22728072 is an abundant number, since it is smaller than the sum of its proper divisors (35303928).

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

22728072 is a wasteful number, since it uses less digits than its factorization.

22728072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20205 (or 20201 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 22728072 is about 4767.3967739218. The cubic root of 22728072 is about 283.2614879735.

The spelling of 22728072 in words is "twenty-two million, seven hundred twenty-eight thousand, seventy-two".