22078885 has 4 divisors (see below), whose sum is σ = 26494668. Its totient is φ = 17663104.

The previous prime is 22078883. The next prime is 22078897. The reversal of 22078885 is 58887022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14333796 + 7745089 = 3786^2 + 2783^2 .

It is a cyclic number.

It is not a de Polignac number, because 22078885 - 2¹ = 22078883 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22078883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2207884 + ... + 2207893.

It is an arithmetic number, because the mean of its divisors is an integer number (6623667).

Almost surely, 2^22078885 is an apocalyptic number.

It is an amenable number.

22078885 is a deficient number, since it is larger than the sum of its proper divisors (4415783).

22078885 is an equidigital number, since it uses as much as digits as its factorization.

22078885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4415782.

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 22078885 is about 4698.8174044115. The cubic root of 22078885 is about 280.5384409533.

The spelling of 22078885 in words is "twenty-two million, seventy-eight thousand, eight hundred eighty-five".