2215878 has 24 divisors (see below), whose sum is σ = 5155992. Its totient is φ = 633024.

The previous prime is 2215867. The next prime is 2215901. The reversal of 2215878 is 8785122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3475 + ... + 4062.

It is an arithmetic number, because the mean of its divisors is an integer number (214833).

2^2215878 is an apocalyptic number.

2215878 is an abundant number, since it is smaller than the sum of its proper divisors (2940114).

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

2215878 is a wasteful number, since it uses less digits than its factorization.

2215878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7556 (or 7549 counting only the distinct ones).

The product of its digits is 8960, while the sum is 33.

The square root of 2215878 is about 1488.5825472576. The cubic root of 2215878 is about 130.3712857221.

The spelling of 2215878 in words is "two million, two hundred fifteen thousand, eight hundred seventy-eight".