28343515705 has 8 divisors (see below), whose sum is σ = 34931468232. Its totient is φ = 22061979648.

The previous prime is 28343515699. The next prime is 28343515757. The reversal of 28343515705 is 50751534382.

It can be written as a sum of positive squares in 4 ways, for example, as 16166613904 + 12176901801 = 127148^2 + 110349^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28343515705 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, 76603912 + ... + 76604281.

It is an arithmetic number, because the mean of its divisors is an integer number (4366433529).

Almost surely, 2^28343515705 is an apocalyptic number.

It is an amenable number.

28343515705 is a deficient number, since it is larger than the sum of its proper divisors (6587952527).

28343515705 is a wasteful number, since it uses less digits than its factorization.

28343515705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153208235.

The product of its (nonzero) digits is 504000, while the sum is 43.

The spelling of 28343515705 in words is "twenty-eight billion, three hundred forty-three million, five hundred fifteen thousand, seven hundred five".