28878715245 has 64 divisors (see below), whose sum is σ = 48776048640. Its totient is φ = 14561530368.

The previous prime is 28878715241. The next prime is 28878715249. The reversal of 28878715245 is 54251787882.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28878715241) and next prime (28878715249).

It is not a de Polignac number, because 28878715245 - 2² = 28878715241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28878715241) 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, 29863752 + ... + 29864718.

It is an arithmetic number, because the mean of its divisors is an integer number (762125760).

Almost surely, 2^28878715245 is an apocalyptic number.

It is an amenable number.

28878715245 is a deficient number, since it is larger than the sum of its proper divisors (19897333395).

28878715245 is a wasteful number, since it uses less digits than its factorization.

28878715245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914.

The product of its digits is 10035200, while the sum is 57.

The spelling of 28878715245 in words is "twenty-eight billion, eight hundred seventy-eight million, seven hundred fifteen thousand, two hundred forty-five".