22780724 has 12 divisors (see below), whose sum is σ = 40068000. Its totient is φ = 11332728.

The previous prime is 22780721. The next prime is 22780729. The reversal of 22780724 is 42708722.

It is a happy number.

It is a super-2 number, since 2×22780724² = 1037922771928352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22780721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13514 + ... + 15105.

It is an arithmetic number, because the mean of its divisors is an integer number (3339000).

Almost surely, 2^22780724 is an apocalyptic number.

It is an amenable number.

22780724 is a deficient number, since it is larger than the sum of its proper divisors (17287276).

22780724 is a wasteful number, since it uses less digits than its factorization.

22780724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28822 (or 28820 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 22780724 is about 4772.9156707405. The cubic root of 22780724 is about 283.4800544203.

The spelling of 22780724 in words is "twenty-two million, seven hundred eighty thousand, seven hundred twenty-four".