2278265644 has 12 divisors (see below), whose sum is σ = 4160311344. Its totient is φ = 1089605264.

The previous prime is 2278265617. The next prime is 2278265663. The reversal of 2278265644 is 4465628722.

2278265644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 2278265594 and 2278265603.

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, 12381787 + ... + 12381970.

It is an arithmetic number, because the mean of its divisors is an integer number (346692612).

Almost surely, 2^2278265644 is an apocalyptic number.

It is an amenable number.

2278265644 is a deficient number, since it is larger than the sum of its proper divisors (1882045700).

2278265644 is a wasteful number, since it uses less digits than its factorization.

2278265644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24763784 (or 24763782 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 46.

The square root of 2278265644 is about 47731.1810455178. The cubic root of 2278265644 is about 1315.8350595349.

The spelling of 2278265644 in words is "two billion, two hundred seventy-eight million, two hundred sixty-five thousand, six hundred forty-four".