22085840 has 40 divisors (see below), whose sum is σ = 58686720. Its totient is φ = 7572096.

The previous prime is 22085827. The next prime is 22085851. The reversal of 22085840 is 4858022.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19160 + ... + 20279.

It is an arithmetic number, because the mean of its divisors is an integer number (1467168).

Almost surely, 2^22085840 is an apocalyptic number.

22085840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22085840 is an abundant number, since it is smaller than the sum of its proper divisors (36600880).

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

22085840 is a wasteful number, since it uses less digits than its factorization.

22085840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39459 (or 39453 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 22085840 is about 4699.5574259711. The cubic root of 22085840 is about 280.5678950376.

The spelling of 22085840 in words is "twenty-two million, eighty-five thousand, eight hundred forty".