22212078 has 32 divisors (see below), whose sum is σ = 52012800. Its totient is φ = 6191040.

The previous prime is 22212077. The next prime is 22212079. The reversal of 22212078 is 87021222.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22212077) and next prime (22212079).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212077) 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, 4728 + ... + 8171.

It is an arithmetic number, because the mean of its divisors is an integer number (1625400).

Almost surely, 2^22212078 is an apocalyptic number.

22212078 is an abundant number, since it is smaller than the sum of its proper divisors (29800722).

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

22212078 is a wasteful number, since it uses less digits than its factorization.

22212078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12952.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 22212078 is about 4712.9691278429. The cubic root of 22212078 is about 281.1014354141.

The spelling of 22212078 in words is "twenty-two million, two hundred twelve thousand, seventy-eight".