22780736 has 28 divisors (see below), whose sum is σ = 49316640. Its totient is φ = 10354560.

The previous prime is 22780733. The next prime is 22780777. The reversal of 22780736 is 63708722.

It is a junction number, because it is equal to n+sod(n) for n = 22780696 and 22780705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22780733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15476 + ... + 16883.

Almost surely, 2^22780736 is an apocalyptic number.

It is an amenable number.

22780736 is an abundant number, since it is smaller than the sum of its proper divisors (26535904).

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

22780736 is a wasteful number, since it uses less digits than its factorization.

22780736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32382 (or 32372 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 22780736 is about 4772.9169278335. The cubic root of 22780736 is about 283.4801041958.

The spelling of 22780736 in words is "twenty-two million, seven hundred eighty thousand, seven hundred thirty-six".