22418840 has 16 divisors (see below), whose sum is σ = 50442480. Its totient is φ = 8967520.

The previous prime is 22418839. The next prime is 22418843. The reversal of 22418840 is 4881422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22418843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280196 + ... + 280275.

It is an arithmetic number, because the mean of its divisors is an integer number (3152655).

Almost surely, 2^22418840 is an apocalyptic number.

22418840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22418840 is an abundant number, since it is smaller than the sum of its proper divisors (28023640).

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

22418840 is a wasteful number, since it uses less digits than its factorization.

22418840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560482 (or 560478 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 22418840 is about 4734.8537464213. The cubic root of 22418840 is about 281.9709575577.

The spelling of 22418840 in words is "twenty-two million, four hundred eighteen thousand, eight hundred forty".