22788240 has 40 divisors (see below), whose sum is σ = 70644288. Its totient is φ = 6076800.

The previous prime is 22788223. The next prime is 22788247. The reversal of 22788240 is 4288722.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (22788247) 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, 47236 + ... + 47715.

Almost surely, 2^22788240 is an apocalyptic number.

22788240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22788240 is an abundant number, since it is smaller than the sum of its proper divisors (47856048).

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

22788240 is a wasteful number, since it uses less digits than its factorization.

22788240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94967 (or 94961 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 22788240 is about 4773.7029652043. The cubic root of 22788240 is about 283.5112270002.

The spelling of 22788240 in words is "twenty-two million, seven hundred eighty-eight thousand, two hundred forty".