28878423715 has 8 divisors (see below), whose sum is σ = 34782935760. Its totient is φ = 23016854112.

The previous prime is 28878423661. The next prime is 28878423751. The reversal of 28878423715 is 51732487882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28878423715 - 2¹³ = 28878415523 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10734129 + ... + 10736818.

It is an arithmetic number, because the mean of its divisors is an integer number (4347866970).

Almost surely, 2^28878423715 is an apocalyptic number.

28878423715 is a deficient number, since it is larger than the sum of its proper divisors (5904512045).

28878423715 is a wasteful number, since it uses less digits than its factorization.

28878423715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21471221.

The product of its digits is 6021120, while the sum is 55.

The spelling of 28878423715 in words is "twenty-eight billion, eight hundred seventy-eight million, four hundred twenty-three thousand, seven hundred fifteen".