2278285 has 8 divisors (see below), whose sum is σ = 2780640. Its totient is φ = 1791504.

The previous prime is 2278277. The next prime is 2278291. The reversal of 2278285 is 5828722.

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 2278285 - 2³ = 2278277 is a prime.

2278285 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2278285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3567 + ... + 4156.

It is an arithmetic number, because the mean of its divisors is an integer number (347580).

2^2278285 is an apocalyptic number.

It is an amenable number.

2278285 is a deficient number, since it is larger than the sum of its proper divisors (502355).

2278285 is an equidigital number, since it uses as much as digits as its factorization.

2278285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7787.

The product of its digits is 17920, while the sum is 34.

The square root of 2278285 is about 1509.3988869745. The cubic root of 2278285 is about 131.5838785941.

It can be divided in two parts, 2278 and 285, that multiplied together give a triangular number (649230 = T₁₁₃₉).

The spelling of 2278285 in words is "two million, two hundred seventy-eight thousand, two hundred eighty-five".