22780512 has 72 divisors (see below), whose sum is σ = 65631384. Its totient is φ = 7494144.

The previous prime is 22780481. The next prime is 22780523. The reversal of 22780512 is 21508722.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23428 + ... + 24380.

It is an arithmetic number, because the mean of its divisors is an integer number (911547).

Almost surely, 2^22780512 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 22780512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32815692).

22780512 is an abundant number, since it is smaller than the sum of its proper divisors (42850872).

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

22780512 is a wasteful number, since it uses less digits than its factorization.

22780512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052 (or 1041 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 22780512 is about 4772.8934620417. The cubic root of 22780512 is about 283.4791750518.

The spelling of 22780512 in words is "twenty-two million, seven hundred eighty thousand, five hundred twelve".