2278447816 has 8 divisors (see below), whose sum is σ = 4272089670. Its totient is φ = 1139223904.

The previous prime is 2278447771. The next prime is 2278447817. The reversal of 2278447816 is 6187448722.

2278447816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1235803716 + 1042644100 = 35154^2 + 32290^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 2278447816.

It is not an unprimeable number, because it can be changed into a prime (2278447817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142402981 + ... + 142402996.

Almost surely, 2^2278447816 is an apocalyptic number.

It is an amenable number.

2278447816 is a deficient number, since it is larger than the sum of its proper divisors (1993641854).

2278447816 is a wasteful number, since it uses less digits than its factorization.

2278447816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284805983 (or 284805979 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 49.

The square root of 2278447816 is about 47733.0893196743. The cubic root of 2278447816 is about 1315.8701303524.

The spelling of 2278447816 in words is "two billion, two hundred seventy-eight million, four hundred forty-seven thousand, eight hundred sixteen".