28943800705 has 8 divisors (see below), whose sum is σ = 34842129192. Its totient is φ = 23081995008.

The previous prime is 28943800679. The next prime is 28943800729. The reversal of 28943800705 is 50700834982.

It can be written as a sum of positive squares in 4 ways, for example, as 602751601 + 28341049104 = 24551^2 + 168348^2 .

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 28943800705 - 2¹³ = 28943792513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9128952 + ... + 9132121.

It is an arithmetic number, because the mean of its divisors is an integer number (4355266149).

Almost surely, 2^28943800705 is an apocalyptic number.

It is an amenable number.

28943800705 is a deficient number, since it is larger than the sum of its proper divisors (5898328487).

28943800705 is a wasteful number, since it uses less digits than its factorization.

28943800705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18261395.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 28943800705 in words is "twenty-eight billion, nine hundred forty-three million, eight hundred thousand, seven hundred five".