2278729288 has 32 divisors (see below), whose sum is σ = 4821768000. Its totient is φ = 1000068160.

The previous prime is 2278729267. The next prime is 2278729303. The reversal of 2278729288 is 8829278722.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443908 + ... + 449011.

It is an arithmetic number, because the mean of its divisors is an integer number (150680250).

Almost surely, 2^2278729288 is an apocalyptic number.

It is an amenable number.

2278729288 is an abundant number, since it is smaller than the sum of its proper divisors (2543038712).

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

2278729288 is a wasteful number, since it uses less digits than its factorization.

2278729288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892965 (or 892961 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 55.

The square root of 2278729288 is about 47736.0376235816. The cubic root of 2278729288 is about 1315.9243142203.

The spelling of 2278729288 in words is "two billion, two hundred seventy-eight million, seven hundred twenty-nine thousand, two hundred eighty-eight".