28751669934 has 128 divisors (see below), whose sum is σ = 70054709760. Its totient is φ = 7769862144.

The previous prime is 28751669909. The next prime is 28751669971. The reversal of 28751669934 is 43996615782.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1679482 + ... + 1696514.

It is an arithmetic number, because the mean of its divisors is an integer number (547302420).

Almost surely, 2^28751669934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28751669934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35027354880).

28751669934 is an abundant number, since it is smaller than the sum of its proper divisors (41303039826).

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

28751669934 is a wasteful number, since it uses less digits than its factorization.

28751669934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17154.

The product of its digits is 19595520, while the sum is 60.

The spelling of 28751669934 in words is "twenty-eight billion, seven hundred fifty-one million, six hundred sixty-nine thousand, nine hundred thirty-four".