28311612485 has 8 divisors (see below), whose sum is σ = 36587314680. Its totient is φ = 20907036864.

The previous prime is 28311612481. The next prime is 28311612491. The reversal of 28311612485 is 58421611382.

It can be written as a sum of positive squares in 4 ways, for example, as 371487076 + 27940125409 = 19274^2 + 167153^2 .

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 28311612485 - 2² = 28311612481 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28311612481) 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, 217781570 + ... + 217781699.

It is an arithmetic number, because the mean of its divisors is an integer number (4573414335).

Almost surely, 2^28311612485 is an apocalyptic number.

It is an amenable number.

28311612485 is a deficient number, since it is larger than the sum of its proper divisors (8275702195).

28311612485 is a wasteful number, since it uses less digits than its factorization.

28311612485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435563287.

The product of its digits is 92160, while the sum is 41.

The spelling of 28311612485 in words is "twenty-eight billion, three hundred eleven million, six hundred twelve thousand, four hundred eighty-five".