28285285831 has 8 divisors (see below), whose sum is σ = 32671774224. Its totient is φ = 24201313920.

The previous prime is 28285285801. The next prime is 28285285849. The reversal of 28285285831 is 13858258282.

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 28285285831 - 2²⁵ = 28251731399 is a prime.

It is a super-2 number, since 2×28285285831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28285285801) 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, 75628920 + ... + 75629293.

It is an arithmetic number, because the mean of its divisors is an integer number (4083971778).

Almost surely, 2^28285285831 is an apocalyptic number.

28285285831 is a deficient number, since it is larger than the sum of its proper divisors (4386488393).

28285285831 is a wasteful number, since it uses less digits than its factorization.

28285285831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151258241.

The product of its digits is 2457600, while the sum is 52.

The spelling of 28285285831 in words is "twenty-eight billion, two hundred eighty-five million, two hundred eighty-five thousand, eight hundred thirty-one".