22780044 has 36 divisors (see below), whose sum is σ = 65809744. Its totient is φ = 6508512.

The previous prime is 22780039. The next prime is 22780061. The reversal of 22780044 is 44008722.

It is a tau number, because it is divible by the number of its divisors (36).

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, 44947 + ... + 45450.

Almost surely, 2^22780044 is an apocalyptic number.

It is an amenable number.

22780044 is an abundant number, since it is smaller than the sum of its proper divisors (43029700).

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

22780044 is a wasteful number, since it uses less digits than its factorization.

22780044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90414 (or 90409 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 22780044 is about 4772.8444349256. The cubic root of 22780044 is about 283.4772337849.

Adding to 22780044 its reverse (44008722), we get a palindrome (66788766).

The spelling of 22780044 in words is "twenty-two million, seven hundred eighty thousand, forty-four".