2278220688 has 160 divisors (see below), whose sum is σ = 7014729600. Its totient is φ = 705729024.

The previous prime is 2278220639. The next prime is 2278220701. The reversal of 2278220688 is 8860228722.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 432406 + ... + 437642.

It is an arithmetic number, because the mean of its divisors is an integer number (43842060).

Almost surely, 2^2278220688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2278220688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3507364800).

2278220688 is an abundant number, since it is smaller than the sum of its proper divisors (4736508912).

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

2278220688 is a wasteful number, since it uses less digits than its factorization.

2278220688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5326 (or 5314 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The square root of 2278220688 is about 47730.7101141393. The cubic root of 2278220688 is about 1315.8264045492.

The spelling of 2278220688 in words is "two billion, two hundred seventy-eight million, two hundred twenty thousand, six hundred eighty-eight".