2749604778 has 24 divisors (see below), whose sum is σ = 6178125408. Its totient is φ = 916534764.

The previous prime is 2749604749. The next prime is 2749604813. The reversal of 2749604778 is 8774069472.

2749604778 is a `hidden beast` number, since 27 + 4 + 9 + 604 + 7 + 7 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2828326 + ... + 2829297.

It is an arithmetic number, because the mean of its divisors is an integer number (257421892).

Almost surely, 2^2749604778 is an apocalyptic number.

2749604778 is an abundant number, since it is smaller than the sum of its proper divisors (3428520630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2749604778 is an equidigital number, since it uses as much as digits as its factorization.

2749604778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5657640 (or 5657628 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The square root of 2749604778 is about 52436.6739791913. The cubic root of 2749604778 is about 1400.9525452886.

The spelling of 2749604778 in words is "two billion, seven hundred forty-nine million, six hundred four thousand, seven hundred seventy-eight".