28736029860 has 96 divisors (see below), whose sum is σ = 81662878080. Its totient is φ = 7549099008.

The previous prime is 28736029811. The next prime is 28736029919. The reversal of 28736029860 is 6892063782.

It is a super-2 number, since 2×28736029860² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1469467 + ... + 1488893.

It is an arithmetic number, because the mean of its divisors is an integer number (850654980).

Almost surely, 2^28736029860 is an apocalyptic number.

28736029860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28736029860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40831439040).

28736029860 is an abundant number, since it is smaller than the sum of its proper divisors (52926848220).

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

28736029860 is a wasteful number, since it uses less digits than its factorization.

28736029860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19805 (or 19803 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 28736029860 in words is "twenty-eight billion, seven hundred thirty-six million, twenty-nine thousand, eight hundred sixty".