28746078145 has 4 divisors (see below), whose sum is σ = 34495293780. Its totient is φ = 22996862512.

The previous prime is 28746078113. The next prime is 28746078161. The reversal of 28746078145 is 54187064782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15614751681 + 13131326464 = 124959^2 + 114592^2 .

It is a cyclic number.

It is not a de Polignac number, because 28746078145 - 2⁵ = 28746078113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28746078092 and 28746078101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2874607810 + ... + 2874607819.

It is an arithmetic number, because the mean of its divisors is an integer number (8623823445).

Almost surely, 2^28746078145 is an apocalyptic number.

It is an amenable number.

28746078145 is a deficient number, since it is larger than the sum of its proper divisors (5749215635).

28746078145 is an equidigital number, since it uses as much as digits as its factorization.

28746078145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5749215634.

The product of its (nonzero) digits is 3010560, while the sum is 52.

The spelling of 28746078145 in words is "twenty-eight billion, seven hundred forty-six million, seventy-eight thousand, one hundred forty-five".