2748191890 has 8 divisors (see below), whose sum is σ = 4946745420. Its totient is φ = 1099276752.

The previous prime is 2748191879. The next prime is 2748191903. The reversal of 2748191890 is 981918472.

It can be written as a sum of positive squares in 2 ways, for example, as 2693298609 + 54893281 = 51897^2 + 7409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137409585 + ... + 137409604.

Almost surely, 2^2748191890 is an apocalyptic number.

2748191890 is a deficient number, since it is larger than the sum of its proper divisors (2198553530).

2748191890 is a wasteful number, since it uses less digits than its factorization.

2748191890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274819196.

The product of its (nonzero) digits is 290304, while the sum is 49.

The square root of 2748191890 is about 52423.1999214088. The cubic root of 2748191890 is about 1400.7125437449.

The spelling of 2748191890 in words is "two billion, seven hundred forty-eight million, one hundred ninety-one thousand, eight hundred ninety".