2278836 has 36 divisors (see below), whose sum is σ = 6584032. Its totient is φ = 651024.

The previous prime is 2278831. The next prime is 2278847. The reversal of 2278836 is 6388722.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2278836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4270 + ... + 4773.

2^2278836 is an apocalyptic number.

It is an amenable number.

2278836 is an abundant number, since it is smaller than the sum of its proper divisors (4305196).

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

2278836 is a wasteful number, since it uses less digits than its factorization.

2278836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9060 (or 9055 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 2278836 is about 1509.5813989315. The cubic root of 2278836 is about 131.5944855306.

The spelling of 2278836 in words is "two million, two hundred seventy-eight thousand, eight hundred thirty-six".