2749978 has 24 divisors (see below), whose sum is σ = 5236704. Its totient is φ = 1071000.

The previous prime is 2749921. The next prime is 2749991. The reversal of 2749978 is 8799472.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198 + ... + 2353.

It is an arithmetic number, because the mean of its divisors is an integer number (218196).

2^2749978 is an apocalyptic number.

2749978 is a deficient number, since it is larger than the sum of its proper divisors (2486726).

2749978 is a wasteful number, since it uses less digits than its factorization.

2749978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578 (or 2571 counting only the distinct ones).

The product of its digits is 254016, while the sum is 46.

The square root of 2749978 is about 1658.3057619149. The cubic root of 2749978 is about 140.1015929265.

It can be divided in two parts, 27 and 49978, that added together give a palindrome (50005).

The spelling of 2749978 in words is "two million, seven hundred forty-nine thousand, nine hundred seventy-eight".