22720716 has 48 divisors (see below), whose sum is σ = 59673600. Its totient is φ = 7474896.

The previous prime is 22720679. The next prime is 22720741. The reversal of 22720716 is 61702722.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 22720716.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7201 + ... + 9863.

It is an arithmetic number, because the mean of its divisors is an integer number (1243200).

Almost surely, 2^22720716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22720716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29836800).

22720716 is an abundant number, since it is smaller than the sum of its proper divisors (36952884).

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

22720716 is a wasteful number, since it uses less digits than its factorization.

22720716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2755 (or 2747 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 22720716 is about 4766.6252212650. The cubic root of 22720716 is about 283.2309252353.

It can be divided in two parts, 22720 and 716, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 22720716 in words is "twenty-two million, seven hundred twenty thousand, seven hundred sixteen".