2278489236 has 12 divisors (see below), whose sum is σ = 5316474912. Its totient is φ = 759496408.

The previous prime is 2278489231. The next prime is 2278489303. The reversal of 2278489236 is 6329848722.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278489231) 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, 94937040 + ... + 94937063.

It is an arithmetic number, because the mean of its divisors is an integer number (443039576).

Almost surely, 2^2278489236 is an apocalyptic number.

It is an amenable number.

2278489236 is an abundant number, since it is smaller than the sum of its proper divisors (3037985676).

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

2278489236 is a wasteful number, since it uses less digits than its factorization.

2278489236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189874110 (or 189874108 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 51.

The square root of 2278489236 is about 47733.5231886355. The cubic root of 2278489236 is about 1315.8781040571.

The spelling of 2278489236 in words is "two billion, two hundred seventy-eight million, four hundred eighty-nine thousand, two hundred thirty-six".