2742878 has 24 divisors (see below), whose sum is σ = 4526280. Its totient is φ = 1244880.

The previous prime is 2742871. The next prime is 2742881. The reversal of 2742878 is 8782472.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2742871) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 20873 + ... + 21003.

It is an arithmetic number, because the mean of its divisors is an integer number (188595).

2^2742878 is an apocalyptic number.

2742878 is a deficient number, since it is larger than the sum of its proper divisors (1783402).

2742878 is a wasteful number, since it uses less digits than its factorization.

2742878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 181 counting only the distinct ones).

The product of its digits is 50176, while the sum is 38.

The square root of 2742878 is about 1656.1636392579. The cubic root of 2742878 is about 139.9809157660.

The spelling of 2742878 in words is "two million, seven hundred forty-two thousand, eight hundred seventy-eight".