2179878 has 8 divisors (see below), whose sum is σ = 4359768. Its totient is φ = 726624.

The previous prime is 2179867. The next prime is 2179897. The reversal of 2179878 is 8789712.

It is a sphenic number, since it is the product of 3 distinct primes.

2179878 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181651 + ... + 181662.

It is an arithmetic number, because the mean of its divisors is an integer number (544971).

2^2179878 is an apocalyptic number.

2179878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2179878 is a wasteful number, since it uses less digits than its factorization.

2179878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363318.

The product of its digits is 56448, while the sum is 42.

The square root of 2179878 is about 1476.4409910322. The cubic root of 2179878 is about 129.6614068470.

The spelling of 2179878 in words is "two million, one hundred seventy-nine thousand, eight hundred seventy-eight".