28995716081831 has 8 divisors (see below), whose sum is σ = 29041532345904. Its totient is φ = 28949929182720.

The previous prime is 28995716081809. The next prime is 28995716081863. The reversal of 28995716081831 is 13818061759982.

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 28995716081831 - 2¹⁸ = 28995715819687 is a prime.

It is a super-2 number, since 2×28995716081831² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28995716080831) 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, 5364410 + ... + 9314951.

It is an arithmetic number, because the mean of its divisors is an integer number (3630191543238).

Almost surely, 2^{28995716081831} is an apocalyptic number.

28995716081831 is a deficient number, since it is larger than the sum of its proper divisors (45816264073).

28995716081831 is a wasteful number, since it uses less digits than its factorization.

28995716081831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14682481.

The product of its (nonzero) digits is 52254720, while the sum is 68.

The spelling of 28995716081831 in words is "twenty-eight trillion, nine hundred ninety-five billion, seven hundred sixteen million, eighty-one thousand, eight hundred thirty-one".