28306312092 has 144 divisors (see below), whose sum is σ = 74246215680. Its totient is φ = 9088934400.

The previous prime is 28306312079. The next prime is 28306312093. The reversal of 28306312092 is 29021360382.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28306312093) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20797492 + ... + 20798852.

It is an arithmetic number, because the mean of its divisors is an integer number (515598720).

Almost surely, 2^28306312092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28306312092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37123107840).

28306312092 is an abundant number, since it is smaller than the sum of its proper divisors (45939903588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28306312092 is a wasteful number, since it uses less digits than its factorization.

28306312092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624 (or 1619 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 28306312092 in words is "twenty-eight billion, three hundred six million, three hundred twelve thousand, ninety-two".