28291595178 has 128 divisors (see below), whose sum is σ = 71291197440. Its totient is φ = 7271147520.

The previous prime is 28291595173. The next prime is 28291595191. The reversal of 28291595178 is 87159519282.

It is not an unprimeable number, because it can be changed into a prime (28291595173) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28038738 + ... + 28039746.

It is an arithmetic number, because the mean of its divisors is an integer number (556962480).

Almost surely, 2^28291595178 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28291595178, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35645598720).

28291595178 is an abundant number, since it is smaller than the sum of its proper divisors (42999602262).

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

28291595178 is a wasteful number, since it uses less digits than its factorization.

28291595178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612.

The product of its digits is 3628800, while the sum is 57.

The spelling of 28291595178 in words is "twenty-eight billion, two hundred ninety-one million, five hundred ninety-five thousand, one hundred seventy-eight".