2808742 has 4 divisors (see below), whose sum is σ = 4213116. Its totient is φ = 1404370.

The previous prime is 2808739. The next prime is 2808761. The reversal of 2808742 is 2478082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2478082 = 2 ⋅1239041.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702184 + ... + 702187.

It is an arithmetic number, because the mean of its divisors is an integer number (1053279).

2^2808742 is an apocalyptic number.

2808742 is a deficient number, since it is larger than the sum of its proper divisors (1404374).

2808742 is a wasteful number, since it uses less digits than its factorization.

2808742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404373.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 2808742 is about 1675.9301894769. The cubic root of 2808742 is about 141.0925067382.

The spelling of 2808742 in words is "two million, eight hundred eight thousand, seven hundred forty-two".