22066840 has 16 divisors (see below), whose sum is σ = 49650480. Its totient is φ = 8826720.

The previous prime is 22066801. The next prime is 22066859. The reversal of 22066840 is 4866022.

It is a junction number, because it is equal to n+sod(n) for n = 22066799 and 22066808.

It is a congruent number.

It is an unprimeable number.

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, 275796 + ... + 275875.

It is an arithmetic number, because the mean of its divisors is an integer number (3103155).

Almost surely, 2^22066840 is an apocalyptic number.

22066840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22066840 is an abundant number, since it is smaller than the sum of its proper divisors (27583640).

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

22066840 is a wasteful number, since it uses less digits than its factorization.

22066840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551682 (or 551678 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 22066840 is about 4697.5355240807. The cubic root of 22066840 is about 280.4874163328.

The spelling of 22066840 in words is "twenty-two million, sixty-six thousand, eight hundred forty".