2112188878 has 4 divisors (see below), whose sum is σ = 3168283320. Its totient is φ = 1056094438.

The previous prime is 2112188857. The next prime is 2112188893. The reversal of 2112188878 is 8788812112.

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

It is a super-2 number, since 2×2112188878² = 8922683712693797768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528047218 + ... + 528047221.

It is an arithmetic number, because the mean of its divisors is an integer number (792070830).

Almost surely, 2^2112188878 is an apocalyptic number.

2112188878 is a deficient number, since it is larger than the sum of its proper divisors (1056094442).

2112188878 is a wasteful number, since it uses less digits than its factorization.

2112188878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056094441.

The product of its digits is 114688, while the sum is 46.

The square root of 2112188878 is about 45958.5560913308. The cubic root of 2112188878 is about 1283.0519778702.

The spelling of 2112188878 in words is "two billion, one hundred twelve million, one hundred eighty-eight thousand, eight hundred seventy-eight".