28078575330 has 128 divisors (see below), whose sum is σ = 73297921536. Its totient is φ = 6842880000.

The previous prime is 28078575247. The next prime is 28078575347. The reversal of 28078575330 is 3357587082.

It is a self number, because there is not a number n which added to its sum of digits gives 28078575330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23378730 + ... + 23379930.

It is an arithmetic number, because the mean of its divisors is an integer number (572640012).

Almost surely, 2^28078575330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28078575330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36648960768).

28078575330 is an abundant number, since it is smaller than the sum of its proper divisors (45219346206).

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

28078575330 is a wasteful number, since it uses less digits than its factorization.

28078575330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772.

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 28078575330 in words is "twenty-eight billion, seventy-eight million, five hundred seventy-five thousand, three hundred thirty".