22780668 has 12 divisors (see below), whose sum is σ = 53154920. Its totient is φ = 7593552.

The previous prime is 22780661. The next prime is 22780679. The reversal of 22780668 is 86608722.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22780661) 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, 949183 + ... + 949206.

Almost surely, 2^22780668 is an apocalyptic number.

It is an amenable number.

22780668 is an abundant number, since it is smaller than the sum of its proper divisors (30374252).

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

22780668 is a wasteful number, since it uses less digits than its factorization.

22780668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898396 (or 1898394 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 22780668 is about 4772.9098043018. The cubic root of 22780668 is about 283.4798221348.

The spelling of 22780668 in words is "twenty-two million, seven hundred eighty thousand, six hundred sixty-eight".