22720272 has 40 divisors (see below), whose sum is σ = 60591360. Its totient is φ = 7328640.

The previous prime is 22720267. The next prime is 22720277. The reversal of 22720272 is 27202722.

It is an interprime number because it is at equal distance from previous prime (22720267) and next prime (22720277).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (22720277) 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, 6147 + ... + 9122.

It is an arithmetic number, because the mean of its divisors is an integer number (1514784).

Almost surely, 2^22720272 is an apocalyptic number.

It is an amenable number.

22720272 is an abundant number, since it is smaller than the sum of its proper divisors (37871088).

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

22720272 is a wasteful number, since it uses less digits than its factorization.

22720272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15311 (or 15305 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 22720272 is about 4766.5786472060. The cubic root of 22720272 is about 283.2290802913.

Adding to 22720272 its reverse (27202722), we get a palindrome (49922994).

The spelling of 22720272 in words is "twenty-two million, seven hundred twenty thousand, two hundred seventy-two".