2740778 has 4 divisors (see below), whose sum is σ = 4111170. Its totient is φ = 1370388.

The previous prime is 2740763. The next prime is 2740799. The reversal of 2740778 is 8770472.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2679769 + 61009 = 1637^2 + 247^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685193 + ... + 685196.

2^2740778 is an apocalyptic number.

2740778 is a deficient number, since it is larger than the sum of its proper divisors (1370392).

2740778 is a wasteful number, since it uses less digits than its factorization.

2740778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370391.

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 2740778 is about 1655.5295225395. The cubic root of 2740778 is about 139.9451826205.

The spelling of 2740778 in words is "two million, seven hundred forty thousand, seven hundred seventy-eight".