2778463 has 8 divisors (see below), whose sum is σ = 2956608. Its totient is φ = 2601984.

The previous prime is 2778439. The next prime is 2778467. The reversal of 2778463 is 3648772.

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 2778463 - 2¹⁷ = 2647391 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 7 + 7⁴ + 8⁷ + 4⁷ + 6 + 3¹² .

It is a Duffinian number.

2778463 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5770 + ... + 6232.

It is an arithmetic number, because the mean of its divisors is an integer number (369576).

2^2778463 is an apocalyptic number.

2778463 is a deficient number, since it is larger than the sum of its proper divisors (178145).

2778463 is a wasteful number, since it uses less digits than its factorization.

2778463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833.

The product of its digits is 56448, while the sum is 37.

The square root of 2778463 is about 1666.8722206576. The cubic root of 2778463 is about 140.5836687094.

The spelling of 2778463 in words is "two million, seven hundred seventy-eight thousand, four hundred sixty-three".