22516840 has 32 divisors (see below), whose sum is σ = 53644680. Its totient is φ = 8476672.

The previous prime is 22516829. The next prime is 22516841. The reversal of 22516840 is 4861522.

It can be written as a sum of positive squares in 4 ways, for example, as 18198756 + 4318084 = 4266^2 + 2078^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22516799 and 22516808.

It is not an unprimeable number, because it can be changed into a prime (22516841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15877 + ... + 17236.

Almost surely, 2^22516840 is an apocalyptic number.

22516840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22516840 is an abundant number, since it is smaller than the sum of its proper divisors (31127840).

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

22516840 is a wasteful number, since it uses less digits than its factorization.

22516840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33141 (or 33137 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 22516840 is about 4745.1912500973. The cubic root of 22516840 is about 282.3812224191.

The spelling of 22516840 in words is "twenty-two million, five hundred sixteen thousand, eight hundred forty".