28112285731 has 8 divisors (see below), whose sum is σ = 28645174800. Its totient is φ = 27584219520.

The previous prime is 28112285711. The next prime is 28112285743. The reversal of 28112285731 is 13758221182.

It is a happy number.

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 28112285731 - 2⁵ = 28112285699 is a prime.

It is a super-2 number, since 2×28112285731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28112285701) 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, 1193946 + ... + 1217263.

It is an arithmetic number, because the mean of its divisors is an integer number (3580646850).

Almost surely, 2^28112285731 is an apocalyptic number.

28112285731 is a deficient number, since it is larger than the sum of its proper divisors (532889069).

28112285731 is a wasteful number, since it uses less digits than its factorization.

28112285731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411429.

The product of its digits is 53760, while the sum is 40.

The spelling of 28112285731 in words is "twenty-eight billion, one hundred twelve million, two hundred eighty-five thousand, seven hundred thirty-one".