2748778 has 8 divisors (see below), whose sum is σ = 4133700. Its totient is φ = 1370880.

The previous prime is 2748769. The next prime is 2748803. The reversal of 2748778 is 8778472.

It can be written as a sum of positive squares in 2 ways, for example, as 2442969 + 305809 = 1563^2 + 553^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633 + ... + 2428.

2^2748778 is an apocalyptic number.

2748778 is a deficient number, since it is larger than the sum of its proper divisors (1384922).

2748778 is a wasteful number, since it uses less digits than its factorization.

2748778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512.

The product of its digits is 175616, while the sum is 43.

The square root of 2748778 is about 1657.9439073744. The cubic root of 2748778 is about 140.0812113851.

The spelling of 2748778 in words is "two million, seven hundred forty-eight thousand, seven hundred seventy-eight".