28293311995 has 8 divisors (see below), whose sum is σ = 36563664816. Its totient is φ = 20893522656.

The previous prime is 28293311993. The next prime is 28293312017. The reversal of 28293311995 is 59911339282.

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 28293311995 - 2¹ = 28293311993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28293311993) 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, 217640797 + ... + 217640926.

It is an arithmetic number, because the mean of its divisors is an integer number (4570458102).

Almost surely, 2^28293311995 is an apocalyptic number.

28293311995 is a deficient number, since it is larger than the sum of its proper divisors (8270352821).

28293311995 is a wasteful number, since it uses less digits than its factorization.

28293311995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435281741.

The product of its digits is 1049760, while the sum is 52.

The spelling of 28293311995 in words is "twenty-eight billion, two hundred ninety-three million, three hundred eleven thousand, nine hundred ninety-five".