2278812 has 12 divisors (see below), whose sum is σ = 5317256. Its totient is φ = 759600.

The previous prime is 2278811. The next prime is 2278813. The reversal of 2278812 is 2188722.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2278811) and next prime (2278813).

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2278812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94939 + ... + 94962.

2^2278812 is an apocalyptic number.

It is an amenable number.

2278812 is an abundant number, since it is smaller than the sum of its proper divisors (3038444).

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

2278812 is a wasteful number, since it uses less digits than its factorization.

2278812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189908 (or 189906 counting only the distinct ones).

The product of its digits is 3584, while the sum is 30.

The square root of 2278812 is about 1509.5734496870. The cubic root of 2278812 is about 131.5940235581.

The spelling of 2278812 in words is "two million, two hundred seventy-eight thousand, eight hundred twelve".