2749191990 has 16 divisors (see below), whose sum is σ = 6598060848. Its totient is φ = 733117856.

The previous prime is 2749191953. The next prime is 2749192007. The reversal of 2749191990 is 991919472.

It is a Smith number, since the sum of its digits (51) 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45819837 + ... + 45819896.

It is an arithmetic number, because the mean of its divisors is an integer number (412378803).

Almost surely, 2^2749191990 is an apocalyptic number.

2749191990 is an abundant number, since it is smaller than the sum of its proper divisors (3848868858).

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

2749191990 is a wasteful number, since it uses less digits than its factorization.

2749191990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91639743.

The product of its (nonzero) digits is 367416, while the sum is 51.

The square root of 2749191990 is about 52432.7377694509. The cubic root of 2749191990 is about 1400.8824351713.

The spelling of 2749191990 in words is "two billion, seven hundred forty-nine million, one hundred ninety-one thousand, nine hundred ninety".