22785516 has 48 divisors (see below), whose sum is σ = 63621600. Its totient is φ = 7010496.

The previous prime is 22785509. The next prime is 22785517. The reversal of 22785516 is 61558722.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (22785517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6711 + ... + 9518.

It is an arithmetic number, because the mean of its divisors is an integer number (1325450).

Almost surely, 2^22785516 is an apocalyptic number.

22785516 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

22785516 is an abundant number, since it is smaller than the sum of its proper divisors (40836084).

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

22785516 is a wasteful number, since it uses less digits than its factorization.

22785516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16255 (or 16247 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 22785516 is about 4773.4176435757. The cubic root of 22785516 is about 283.4999300131.

The spelling of 22785516 in words is "twenty-two million, seven hundred eighty-five thousand, five hundred sixteen".