22861240 has 16 divisors (see below), whose sum is σ = 51437880. Its totient is φ = 9144480.

The previous prime is 22861187. The next prime is 22861247. The reversal of 22861240 is 4216822.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22861247) 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, 285726 + ... + 285805.

Almost surely, 2^22861240 is an apocalyptic number.

22861240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22861240 is an abundant number, since it is smaller than the sum of its proper divisors (28576640).

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

22861240 is a wasteful number, since it uses less digits than its factorization.

22861240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571542 (or 571538 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 22861240 is about 4781.3429075941. The cubic root of 22861240 is about 283.8136382328.

The spelling of 22861240 in words is "twenty-two million, eight hundred sixty-one thousand, two hundred forty".