28110317436 has 120 divisors (see below), whose sum is σ = 74819846640. Its totient is φ = 9200563200.

The previous prime is 28110317369. The next prime is 28110317453. The reversal of 28110317436 is 63471301182.

It is a happy number.

It is a super-2 number, since 2×28110317436² (a number of 22 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28110317436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18359991 + ... + 18361521.

It is an arithmetic number, because the mean of its divisors is an integer number (623498722).

Almost surely, 2^28110317436 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 28110317436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37409923320).

28110317436 is an abundant number, since it is smaller than the sum of its proper divisors (46709529204).

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

28110317436 is a wasteful number, since it uses less digits than its factorization.

28110317436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537 (or 2526 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 28110317436 in words is "twenty-eight billion, one hundred ten million, three hundred seventeen thousand, four hundred thirty-six".