22780056 has 32 divisors (see below), whose sum is σ = 61331760. Its totient is φ = 7009152.

The previous prime is 22780039. The next prime is 22780061. The reversal of 22780056 is 65008722.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36195 + ... + 36818.

Almost surely, 2^22780056 is an apocalyptic number.

22780056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

22780056 is an abundant number, since it is smaller than the sum of its proper divisors (38551704).

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

22780056 is a wasteful number, since it uses less digits than its factorization.

22780056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73035 (or 73031 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 22780056 is about 4772.8456920374. The cubic root of 22780056 is about 283.4772835613.

Adding to 22780056 its reverse (65008722), we get a palindrome (87788778).

The spelling of 22780056 in words is "twenty-two million, seven hundred eighty thousand, fifty-six".