2278287 has 20 divisors (see below), whose sum is σ = 3714216. Its totient is φ = 1380240.

The previous prime is 2278277. The next prime is 2278291. The reversal of 2278287 is 7828722.

2278287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-2278287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278207) 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 19 ways as a sum of consecutive naturals, for example, 388 + ... + 2169.

2^2278287 is an apocalyptic number.

2278287 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2278287 is a deficient number, since it is larger than the sum of its proper divisors (1435929).

2278287 is a wasteful number, since it uses less digits than its factorization.

2278287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580 (or 2571 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 2278287 is about 1509.3995494898. The cubic root of 2278287 is about 131.5839170979.

The spelling of 2278287 in words is "two million, two hundred seventy-eight thousand, two hundred eighty-seven".