22720024 has 48 divisors (see below), whose sum is σ = 46860480. Its totient is φ = 10314240.

The previous prime is 22720013. The next prime is 22720037. The reversal of 22720024 is 42002722.

It is a junction number, because it is equal to n+sod(n) for n = 22719983 and 22720010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71514 + ... + 71830.

It is an arithmetic number, because the mean of its divisors is an integer number (976260).

Almost surely, 2^22720024 is an apocalyptic number.

It is an amenable number.

22720024 is an abundant number, since it is smaller than the sum of its proper divisors (24140456).

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

22720024 is a wasteful number, since it uses less digits than its factorization.

22720024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 22720024 is about 4766.5526326686. The cubic root of 22720024 is about 283.2280497715.

Adding to 22720024 its reverse (42002722), we get a palindrome (64722746).

The spelling of 22720024 in words is "twenty-two million, seven hundred twenty thousand, twenty-four".