2278785 has 16 divisors (see below), whose sum is σ = 3731904. Its totient is φ = 1186752.

The previous prime is 2278769. The next prime is 2278807. The reversal of 2278785 is 5878722.

It is not a de Polignac number, because 2278785 - 2⁴ = 2278769 is a prime.

It is a super-2 number, since 2×2278785² = 10385722152450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1122 + ... + 2411.

It is an arithmetic number, because the mean of its divisors is an integer number (233244).

2^2278785 is an apocalyptic number.

It is an amenable number.

2278785 is a deficient number, since it is larger than the sum of its proper divisors (1453119).

2278785 is a wasteful number, since it uses less digits than its factorization.

2278785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584.

The product of its digits is 62720, while the sum is 39.

The square root of 2278785 is about 1509.5645067370. The cubic root of 2278785 is about 131.5935038352.

The spelling of 2278785 in words is "two million, two hundred seventy-eight thousand, seven hundred eighty-five".