2278864 has 20 divisors (see below), whose sum is σ = 5046304. Its totient is φ = 976608.

The previous prime is 2278847. The next prime is 2278877. The reversal of 2278864 is 4688722.

It is a super-2 number, since 2×2278864² = 10386442260992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10062 + ... + 10285.

2^2278864 is an apocalyptic number.

It is an amenable number.

2278864 is an abundant number, since it is smaller than the sum of its proper divisors (2767440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2278864 is a wasteful number, since it uses less digits than its factorization.

2278864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20362 (or 20356 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 2278864 is about 1509.5906729972. The cubic root of 2278864 is about 131.5950244945.

The spelling of 2278864 in words is "two million, two hundred seventy-eight thousand, eight hundred sixty-four".