22087878 has 16 divisors (see below), whose sum is σ = 44276736. Its totient is φ = 7345800.

The previous prime is 22087873. The next prime is 22087883. The reversal of 22087878 is 87878022.

It is an interprime number because it is at equal distance from previous prime (22087873) and next prime (22087883).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22087873) 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, 1198 + ... + 6753.

It is an arithmetic number, because the mean of its divisors is an integer number (2767296).

Almost surely, 2^22087878 is an apocalyptic number.

22087878 is an abundant number, since it is smaller than the sum of its proper divisors (22188858).

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

22087878 is a wasteful number, since it uses less digits than its factorization.

22087878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8419.

The product of its (nonzero) digits is 100352, while the sum is 42.

The square root of 22087878 is about 4699.7742498975. The cubic root of 22087878 is about 280.5765246963.

The spelling of 22087878 in words is "twenty-two million, eighty-seven thousand, eight hundred seventy-eight".