22212678 has 32 divisors (see below), whose sum is σ = 46126080. Its totient is φ = 7123680.

The previous prime is 22212677. The next prime is 22212679. The reversal of 22212678 is 87621222.

It is an interprime number because it is at equal distance from previous prime (22212677) and next prime (22212679).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212677) 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 15 ways as a sum of consecutive naturals, for example, 56908 + ... + 57296.

It is an arithmetic number, because the mean of its divisors is an integer number (1441440).

Almost surely, 2^22212678 is an apocalyptic number.

22212678 is an abundant number, since it is smaller than the sum of its proper divisors (23913402).

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

22212678 is a wasteful number, since it uses less digits than its factorization.

22212678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its digits is 5376, while the sum is 30.

The square root of 22212678 is about 4713.0327815537. The cubic root of 22212678 is about 281.1039664597.

The spelling of 22212678 in words is "twenty-two million, two hundred twelve thousand, six hundred seventy-eight".