2197740644 has 24 divisors (see below), whose sum is σ = 4210536288. Its totient is φ = 995437440.

The previous prime is 2197740593. The next prime is 2197740653. The reversal of 2197740644 is 4460477912.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 2197740595 and 2197740604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75797 + ... + 100700.

It is an arithmetic number, because the mean of its divisors is an integer number (175439012).

Almost surely, 2^2197740644 is an apocalyptic number.

It is an amenable number.

2197740644 is a deficient number, since it is larger than the sum of its proper divisors (2012795644).

2197740644 is a wasteful number, since it uses less digits than its factorization.

2197740644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176795 (or 176793 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 2197740644 is about 46880.0665955158. The cubic root of 2197740644 is about 1300.1460672166.

The spelling of 2197740644 in words is "two billion, one hundred ninety-seven million, seven hundred forty thousand, six hundred forty-four".