22078818 has 40 divisors (see below), whose sum is σ = 52389612. Its totient is φ = 6925824.

The previous prime is 22078813. The next prime is 22078843. The reversal of 22078818 is 81887022.

It can be written as a sum of positive squares in 2 ways, for example, as 21316689 + 762129 = 4617^2 + 873^2 .

It is not an unprimeable number, because it can be changed into a prime (22078813) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 1255 + ... + 6762.

Almost surely, 2^22078818 is an apocalyptic number.

22078818 is an abundant number, since it is smaller than the sum of its proper divisors (30310794).

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

22078818 is a wasteful number, since it uses less digits than its factorization.

22078818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8048 (or 8039 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 22078818 is about 4698.8102749526. The cubic root of 22078818 is about 280.5381571815.

It can be divided in two parts, 2207 and 8818, that added together give a square (11025 = 105²).

The spelling of 22078818 in words is "twenty-two million, seventy-eight thousand, eight hundred eighteen".