2197800 has 192 divisors, whose sum is σ = 8481600. Its totient is φ = 518400.

The previous prime is 2197799. The next prime is 2197847. The reversal of 2197800 is 87912.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59382 + ... + 59418.

It is an arithmetic number, because the mean of its divisors is an integer number (44175).

2^2197800 is an apocalyptic number.

2197800 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 2197800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4240800).

2197800 is an abundant number, since it is smaller than the sum of its proper divisors (6283800).

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

2197800 is a wasteful number, since it uses less digits than its factorization.

2197800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 2197800 is about 1482.4978920727. The cubic root of 2197800 is about 130.0157771779.

Multiplying 2197800 by its reverse (87912), we get a square (193212993600 = 439560²).

2197800 divided by its reverse (87912) gives a square (25 = 5²).

The spelling of 2197800 in words is "two million, one hundred ninety-seven thousand, eight hundred".