22780026 has 12 divisors (see below), whose sum is σ = 49356762. Its totient is φ = 7593336.

The previous prime is 22780013. The next prime is 22780027. The reversal of 22780026 is 62008722.

It can be written as a sum of positive squares in only one way, i.e., 22099401 + 680625 = 4701^2 + 825^2 .

It is not an unprimeable number, because it can be changed into a prime (22780027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 632761 + ... + 632796.

Almost surely, 2^22780026 is an apocalyptic number.

22780026 is an abundant number, since it is smaller than the sum of its proper divisors (26576736).

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

22780026 is a wasteful number, since it uses less digits than its factorization.

22780026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265565 (or 1265562 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 22780026 is about 4772.8425492572. The cubic root of 22780026 is about 283.4771591202.

Adding to 22780026 its reverse (62008722), we get a palindrome (84788748).

The spelling of 22780026 in words is "twenty-two million, seven hundred eighty thousand, twenty-six".