2728742838 has 32 divisors (see below), whose sum is σ = 5505743232. Its totient is φ = 901555200.

The previous prime is 2728742827. The next prime is 2728742903. The reversal of 2728742838 is 8382478272.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 904753 + ... + 907763.

It is an arithmetic number, because the mean of its divisors is an integer number (172054476).

Almost surely, 2^2728742838 is an apocalyptic number.

2728742838 is an abundant number, since it is smaller than the sum of its proper divisors (2777000394).

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

2728742838 is a wasteful number, since it uses less digits than its factorization.

2728742838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300.

The product of its digits is 2408448, while the sum is 51.

The square root of 2728742838 is about 52237.3701290561. The cubic root of 2728742838 is about 1397.4004205359.

It can be divided in two parts, 27287 and 42838, that added together give a triangular number (70125 = T₃₇₄).

The spelling of 2728742838 in words is "two billion, seven hundred twenty-eight million, seven hundred forty-two thousand, eight hundred thirty-eight".