28130093516 has 48 divisors (see below), whose sum is σ = 57564874752. Its totient is φ = 11777140800.

The previous prime is 28130093471. The next prime is 28130093521. The reversal of 28130093516 is 61539003182.

It is a happy number.

It is a super-2 number, since 2×28130093516² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28130093516.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 692201 + ... + 731711.

It is an arithmetic number, because the mean of its divisors is an integer number (1199268224).

Almost surely, 2^28130093516 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 28130093516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28782437376).

28130093516 is an abundant number, since it is smaller than the sum of its proper divisors (29434781236).

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

28130093516 is a wasteful number, since it uses less digits than its factorization.

28130093516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40110 (or 40108 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

Adding to 28130093516 its reverse (61539003182), we get a palindrome (89669096698).

The spelling of 28130093516 in words is "twenty-eight billion, one hundred thirty million, ninety-three thousand, five hundred sixteen".