2278743 has 4 divisors (see below), whose sum is σ = 3038328. Its totient is φ = 1519160.

The previous prime is 2278729. The next prime is 2278747. The reversal of 2278743 is 3478722.

2278743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2278743 - 2⁸ = 2278487 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 2²¹ + 7⁵ + 8³ + 7⁵ + 4⁷ + 3² .

It is a D-number.

2278743 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379788 + ... + 379793.

It is an arithmetic number, because the mean of its divisors is an integer number (759582).

2^2278743 is an apocalyptic number.

2278743 is a deficient number, since it is larger than the sum of its proper divisors (759585).

2278743 is an equidigital number, since it uses as much as digits as its factorization.

2278743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759584.

The product of its digits is 18816, while the sum is 33.

The square root of 2278743 is about 1509.5505953760. The cubic root of 2278743 is about 131.5926953691.

The spelling of 2278743 in words is "two million, two hundred seventy-eight thousand, seven hundred forty-three".