22012984 has 32 divisors (see below), whose sum is σ = 47882880. Its totient is φ = 9291744.

The previous prime is 22012981. The next prime is 22013021. The reversal of 22012984 is 48921022.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 819 + ... + 6685.

It is an arithmetic number, because the mean of its divisors is an integer number (1496340).

Almost surely, 2^22012984 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 22012984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23941440).

22012984 is an abundant number, since it is smaller than the sum of its proper divisors (25869896).

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

22012984 is a wasteful number, since it uses less digits than its factorization.

22012984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5947 (or 5943 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 22012984 is about 4691.7996547167. The cubic root of 22012984 is about 280.2590459803.

The spelling of 22012984 in words is "twenty-two million, twelve thousand, nine hundred eighty-four".