2194780 has 48 divisors (see below), whose sum is σ = 5374656. Its totient is φ = 737280.

The previous prime is 2194757. The next prime is 2194811. The reversal of 2194780 is 874912.

2194780 = 20² + 21² + ... + 187².

2194780 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

2194780 is strictly pandigital in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8412 + ... + 8668.

It is an arithmetic number, because the mean of its divisors is an integer number (111972).

2^2194780 is an apocalyptic number.

2194780 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 2194780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2687328).

2194780 is an abundant number, since it is smaller than the sum of its proper divisors (3179876).

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

2194780 is a wasteful number, since it uses less digits than its factorization.

2194780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 2194780 is about 1481.4789907386. The cubic root of 2194780 is about 129.9561982610.

The spelling of 2194780 in words is "two million, one hundred ninety-four thousand, seven hundred eighty".