28999235712 has 64 divisors (see below), whose sum is σ = 78908024160. Its totient is φ = 9430640640.

The previous prime is 28999235689. The next prime is 28999235717. The reversal of 28999235712 is 21753299982.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×28999235712² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28999235717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905218 + ... + 936705.

Almost surely, 2^28999235712 is an apocalyptic number.

It is an amenable number.

28999235712 is an abundant number, since it is smaller than the sum of its proper divisors (49908788448).

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

28999235712 is a wasteful number, since it uses less digits than its factorization.

28999235712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841981 (or 1841969 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 57.

The spelling of 28999235712 in words is "twenty-eight billion, nine hundred ninety-nine million, two hundred thirty-five thousand, seven hundred twelve".