2190940366 has 4 divisors (see below), whose sum is σ = 3286410552. Its totient is φ = 1095470182.

The previous prime is 2190940363. The next prime is 2190940441. The reversal of 2190940366 is 6630490912.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190940361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547735090 + ... + 547735093.

It is an arithmetic number, because the mean of its divisors is an integer number (821602638).

Almost surely, 2^2190940366 is an apocalyptic number.

2190940366 is a deficient number, since it is larger than the sum of its proper divisors (1095470186).

2190940366 is a wasteful number, since it uses less digits than its factorization.

2190940366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095470185.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 2190940366 is about 46807.4819446635. The cubic root of 2190940366 is about 1298.8037053927.

The spelling of 2190940366 in words is "two billion, one hundred ninety million, nine hundred forty thousand, three hundred sixty-six".