2198780 has 48 divisors (see below), whose sum is σ = 5080320. Its totient is φ = 795648.

The previous prime is 2198767. The next prime is 2198783. The reversal of 2198780 is 878912.

2198780 = T₄₁₆ + T₄₁₇ + ... + T₄₃₉.

It is a happy number.

2198780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2198780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2198783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9749 + ... + 9971.

It is an arithmetic number, because the mean of its divisors is an integer number (105840).

2^2198780 is an apocalyptic number.

2198780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2198780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2540160).

2198780 is an abundant number, since it is smaller than the sum of its proper divisors (2881540).

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

2198780 is a wasteful number, since it uses less digits than its factorization.

2198780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 2198780 is about 1482.8283784714. The cubic root of 2198780 is about 130.0350990039.

The spelling of 2198780 in words is "two million, one hundred ninety-eight thousand, seven hundred eighty".