2278207644 has 24 divisors (see below), whose sum is σ = 5319245568. Its totient is φ = 758912880.

The previous prime is 2278207619. The next prime is 2278207649. The reversal of 2278207644 is 4467028722.

It is a junction number, because it is equal to n+sod(n) for n = 2278207596 and 2278207605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278207649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41572 + ... + 79275.

It is an arithmetic number, because the mean of its divisors is an integer number (221635232).

Almost surely, 2^2278207644 is an apocalyptic number.

It is an amenable number.

2278207644 is an abundant number, since it is smaller than the sum of its proper divisors (3041037924).

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

2278207644 is a wasteful number, since it uses less digits than its factorization.

2278207644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122425 (or 122423 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 42.

The square root of 2278207644 is about 47730.5734723563. The cubic root of 2278207644 is about 1315.8238932806.

The spelling of 2278207644 in words is "two billion, two hundred seventy-eight million, two hundred seven thousand, six hundred forty-four".