22666240 has 88 divisors (see below), whose sum is σ = 57479760. Its totient is φ = 8552448.

The previous prime is 22666213. The next prime is 22666249. The reversal of 22666240 is 4266622.

It is a junction number, because it is equal to n+sod(n) for n = 22666199 and 22666208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22666249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97164 + ... + 97396.

Almost surely, 2^22666240 is an apocalyptic number.

22666240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22666240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28739880).

22666240 is an abundant number, since it is smaller than the sum of its proper divisors (34813520).

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

22666240 is a wasteful number, since it uses less digits than its factorization.

22666240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 22666240 is about 4760.9074765217. The cubic root of 22666240 is about 283.0043825565.

It can be divided in two parts, 226 and 66240, that added together give a palindrome (66466).

The spelling of 22666240 in words is "twenty-two million, six hundred sixty-six thousand, two hundred forty".