22722724 has 6 divisors (see below), whose sum is σ = 39764774. Its totient is φ = 11361360.

The previous prime is 22722719. The next prime is 22722731. The reversal of 22722724 is 42722722.

It can be written as a sum of positive squares in only one way, i.e., 20412324 + 2310400 = 4518^2 + 1520^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22722692 and 22722701.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2840337 + ... + 2840344.

Almost surely, 2^22722724 is an apocalyptic number.

It is an amenable number.

22722724 is a deficient number, since it is larger than the sum of its proper divisors (17042050).

22722724 is a wasteful number, since it uses less digits than its factorization.

22722724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5680685 (or 5680683 counting only the distinct ones).

The product of its digits is 6272, while the sum is 28.

The square root of 22722724 is about 4766.8358478135. The cubic root of 22722724 is about 283.2392687363.

The spelling of 22722724 in words is "twenty-two million, seven hundred twenty-two thousand, seven hundred twenty-four".