2197790 has 16 divisors (see below), whose sum is σ = 4521312. Its totient is φ = 753504.

The previous prime is 2197781. The next prime is 2197799. The reversal of 2197790 is 977912.

It is an interprime number because it is at equal distance from previous prime (2197781) and next prime (2197799).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 2197790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2197799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15629 + ... + 15768.

It is an arithmetic number, because the mean of its divisors is an integer number (282582).

2^2197790 is an apocalyptic number.

2197790 is an abundant number, since it is smaller than the sum of its proper divisors (2323522).

2197790 is a wasteful number, since it uses less digits than its factorization.

2197790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31411.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 2197790 is about 1482.4945193828. The cubic root of 2197790 is about 130.0155799868.

The spelling of 2197790 in words is "two million, one hundred ninety-seven thousand, seven hundred ninety".