28901339136 has 182 divisors, whose sum is σ = 86662745840. Its totient is φ = 9632784384.

The previous prime is 28901339113. The next prime is 28901339179. The reversal of 28901339136 is 63193310982.

28901339136 is a `hidden beast` number, since 289 + 0 + 1 + 339 + 1 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28901339091 and 28901339100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 2981145 + ... + 2990823.

Almost surely, 2^28901339136 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 28901339136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43331372920).

28901339136 is an abundant number, since it is smaller than the sum of its proper divisors (57761406704).

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

28901339136 is an frugal number, since it uses more digits than its factorization.

28901339136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9721 (or 9684 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 28901339136 in words is "twenty-eight billion, nine hundred one million, three hundred thirty-nine thousand, one hundred thirty-six".