2278690128 has 240 divisors, whose sum is σ = 7677633600. Its totient is φ = 621619200.

The previous prime is 2278690091. The next prime is 2278690133. The reversal of 2278690128 is 8210968722.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 842923 + ... + 845621.

It is an arithmetic number, because the mean of its divisors is an integer number (31990140).

Almost surely, 2^2278690128 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 2278690128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3838816800).

2278690128 is an abundant number, since it is smaller than the sum of its proper divisors (5398943472).

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

2278690128 is a wasteful number, since it uses less digits than its factorization.

2278690128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778 (or 2769 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 2278690128 is about 47735.6274495266. The cubic root of 2278690128 is about 1315.9167761169.

The spelling of 2278690128 in words is "two billion, two hundred seventy-eight million, six hundred ninety thousand, one hundred twenty-eight".