2728178158 has 4 divisors (see below), whose sum is σ = 4092267240. Its totient is φ = 1364089078.

The previous prime is 2728178153. The next prime is 2728178227. The reversal of 2728178158 is 8518718272.

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

It is a Smith number, since the sum of its digits (49) 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 (2728178153) by changing a digit.

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 as a sum of consecutive naturals, namely, 682044538 + ... + 682044541.

It is an arithmetic number, because the mean of its divisors is an integer number (1023066810).

Almost surely, 2^2728178158 is an apocalyptic number.

2728178158 is a deficient number, since it is larger than the sum of its proper divisors (1364089082).

2728178158 is a wasteful number, since it uses less digits than its factorization.

2728178158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364089081.

The product of its digits is 501760, while the sum is 49.

The square root of 2728178158 is about 52231.9649065589. The cubic root of 2728178158 is about 1397.3040222367.

The spelling of 2728178158 in words is "two billion, seven hundred twenty-eight million, one hundred seventy-eight thousand, one hundred fifty-eight".