22721796 has 60 divisors (see below), whose sum is σ = 62542480. Its totient is φ = 7173360.

The previous prime is 22721767. The next prime is 22721801. The reversal of 22721796 is 69712722.

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

It is a self number, because there is not a number n which added to its sum of digits gives 22721796.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4311 + ... + 8001.

Almost surely, 2^22721796 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 22721796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31271240).

22721796 is an abundant number, since it is smaller than the sum of its proper divisors (39820684).

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

22721796 is a wasteful number, since it uses less digits than its factorization.

22721796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3726 (or 3715 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 22721796 is about 4766.7385076171. The cubic root of 22721796 is about 283.2354128368.

The spelling of 22721796 in words is "twenty-two million, seven hundred twenty-one thousand, seven hundred ninety-six".