28834439634 has 648 divisors, whose sum is σ = 92583219456. Its totient is φ = 6338217600.

The previous prime is 28834439633. The next prime is 28834439651. The reversal of 28834439634 is 43693443882.

28834439634 is a `hidden beast` number, since 2 + 8 + 83 + 443 + 96 + 34 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28834439633) by changing a digit.

It is a polite number, since it can be written in 323 ways as a sum of consecutive naturals, for example, 930143199 + ... + 930143229.

Almost surely, 2^28834439634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28834439634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46291609728).

28834439634 is an abundant number, since it is smaller than the sum of its proper divisors (63748779822).

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

28834439634 is a wasteful number, since it uses less digits than its factorization.

28834439634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 86 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 54.

The spelling of 28834439634 in words is "twenty-eight billion, eight hundred thirty-four million, four hundred thirty-nine thousand, six hundred thirty-four".