2778028013 has 4 divisors (see below), whose sum is σ = 2837135040. Its totient is φ = 2718920988.

The previous prime is 2778028009. The next prime is 2778028027. The reversal of 2778028013 is 3108208772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2778028013 - 2² = 2778028009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778028003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29553443 + ... + 29553536.

It is an arithmetic number, because the mean of its divisors is an integer number (709283760).

Almost surely, 2^2778028013 is an apocalyptic number.

It is an amenable number.

2778028013 is a deficient number, since it is larger than the sum of its proper divisors (59107027).

2778028013 is an equidigital number, since it uses as much as digits as its factorization.

2778028013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59107026.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 2778028013 is about 52707.0015557706. The cubic root of 2778028013 is about 1405.7633188809.

The spelling of 2778028013 in words is "two billion, seven hundred seventy-eight million, twenty-eight thousand, thirteen".