22780872 has 32 divisors (see below), whose sum is σ = 63280800. Its totient is φ = 7593552.

The previous prime is 22780859. The next prime is 22780873. The reversal of 22780872 is 27808722.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (22780873) 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, 52518 + ... + 52949.

It is an arithmetic number, because the mean of its divisors is an integer number (1977525).

Almost surely, 2^22780872 is an apocalyptic number.

It is an amenable number.

22780872 is an abundant number, since it is smaller than the sum of its proper divisors (40499928).

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

22780872 is a wasteful number, since it uses less digits than its factorization.

22780872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105482 (or 105472 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 22780872 is about 4772.9311748652. The cubic root of 22780872 is about 283.4806683159.

The spelling of 22780872 in words is "twenty-two million, seven hundred eighty thousand, eight hundred seventy-two".