28943888815 has 8 divisors (see below), whose sum is σ = 36775764720. Its totient is φ = 21793045632.

The previous prime is 28943888801. The next prime is 28943888819. The reversal of 28943888815 is 51888834982.

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 28943888815 - 2¹⁷ = 28943757743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28943888819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170258085 + ... + 170258254.

It is an arithmetic number, because the mean of its divisors is an integer number (4596970590).

Almost surely, 2^28943888815 is an apocalyptic number.

28943888815 is a deficient number, since it is larger than the sum of its proper divisors (7831875905).

28943888815 is a wasteful number, since it uses less digits than its factorization.

28943888815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340516361.

The product of its digits is 35389440, while the sum is 64.

The spelling of 28943888815 in words is "twenty-eight billion, nine hundred forty-three million, eight hundred eighty-eight thousand, eight hundred fifteen".