22240840 has 16 divisors (see below), whose sum is σ = 50041980. Its totient is φ = 8896320.

The previous prime is 22240831. The next prime is 22240853. The reversal of 22240840 is 4804222.

It can be written as a sum of positive squares in 2 ways, for example, as 22221796 + 19044 = 4714^2 + 138^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277971 + ... + 278050.

Almost surely, 2^22240840 is an apocalyptic number.

22240840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22240840 is an abundant number, since it is smaller than the sum of its proper divisors (27801140).

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

22240840 is a wasteful number, since it uses less digits than its factorization.

22240840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556032 (or 556028 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 22240840 is about 4716.0195080173. The cubic root of 22240840 is about 281.2227140607. Note that the first 3 decimals are identical.

The spelling of 22240840 in words is "twenty-two million, two hundred forty thousand, eight hundred forty".