2278783 has 4 divisors (see below), whose sum is σ = 2454088. Its totient is φ = 2103480.

The previous prime is 2278769. The next prime is 2278807. The reversal of 2278783 is 3878722.

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 2278783 - 2¹³ = 2270591 is a prime.

It is a super-2 number, since 2×2278783² = 10385703922178, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278753) 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 3 ways as a sum of consecutive naturals, for example, 87633 + ... + 87658.

It is an arithmetic number, because the mean of its divisors is an integer number (613522).

2^2278783 is an apocalyptic number.

2278783 is a deficient number, since it is larger than the sum of its proper divisors (175305).

2278783 is a wasteful number, since it uses less digits than its factorization.

2278783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175304.

The product of its digits is 37632, while the sum is 37.

The square root of 2278783 is about 1509.5638442941. The cubic root of 2278783 is about 131.5934653370.

The spelling of 2278783 in words is "two million, two hundred seventy-eight thousand, seven hundred eighty-three".