22780626 has 64 divisors (see below), whose sum is σ = 53222400. Its totient is φ = 6431040.

The previous prime is 22780607. The next prime is 22780627. The reversal of 22780626 is 62608722.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22780627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65100 + ... + 65448.

It is an arithmetic number, because the mean of its divisors is an integer number (831600).

Almost surely, 2^22780626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22780626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26611200).

22780626 is an abundant number, since it is smaller than the sum of its proper divisors (30441774).

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

22780626 is a wasteful number, since it uses less digits than its factorization.

22780626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 22780626 is about 4772.9054044680. The cubic root of 22780626 is about 283.4796479205.

The spelling of 22780626 in words is "twenty-two million, seven hundred eighty thousand, six hundred twenty-six".