2778280783 has 8 divisors (see below), whose sum is σ = 2848703616. Its totient is φ = 2708122200.

The previous prime is 2778280727. The next prime is 2778280789. The reversal of 2778280783 is 3870828772.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2778280783 - 2²⁹ = 2241409871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2778280783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778280789) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 44683 + ... + 86908.

It is an arithmetic number, because the mean of its divisors is an integer number (356087952).

Almost surely, 2^2778280783 is an apocalyptic number.

2778280783 is a deficient number, since it is larger than the sum of its proper divisors (70422833).

2778280783 is a wasteful number, since it uses less digits than its factorization.

2778280783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132125.

The product of its (nonzero) digits is 2107392, while the sum is 52.

The square root of 2778280783 is about 52709.3993799967. The cubic root of 2778280783 is about 1405.8059539222.

The spelling of 2778280783 in words is "two billion, seven hundred seventy-eight million, two hundred eighty thousand, seven hundred eighty-three".