2778013 has 8 divisors (see below), whose sum is σ = 3206528. Its totient is φ = 2357424.

The previous prime is 2778011. The next prime is 2778019. The reversal of 2778013 is 3108772.

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 2778013 - 2¹ = 2778011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1206 + ... + 2647.

It is an arithmetic number, because the mean of its divisors is an integer number (400816).

2^2778013 is an apocalyptic number.

It is an amenable number.

2778013 is a deficient number, since it is larger than the sum of its proper divisors (428515).

2778013 is a wasteful number, since it uses less digits than its factorization.

2778013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3963.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 2778013 is about 1666.7372318395. The cubic root of 2778013 is about 140.5760786537.

The spelling of 2778013 in words is "two million, seven hundred seventy-eight thousand, thirteen".