2178798 has 16 divisors (see below), whose sum is σ = 4429776. Its totient is φ = 714240.

The previous prime is 2178797. The next prime is 2178823. The reversal of 2178798 is 8978712.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2611 + ... + 3342.

It is an arithmetic number, because the mean of its divisors is an integer number (276861).

2^2178798 is an apocalyptic number.

2178798 is an abundant number, since it is smaller than the sum of its proper divisors (2250978).

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

2178798 is a wasteful number, since it uses less digits than its factorization.

2178798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6019.

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

The square root of 2178798 is about 1476.0752013363. The cubic root of 2178798 is about 129.6399901359.

The spelling of 2178798 in words is "two million, one hundred seventy-eight thousand, seven hundred ninety-eight".