28988374932 has 144 divisors (see below), whose sum is σ = 83158892544. Its totient is φ = 8756748000.

The previous prime is 28988374889. The next prime is 28988374981. The reversal of 28988374932 is 23947388982.

28988374932 is a `hidden beast` number, since 28 + 98 + 8 + 37 + 493 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28988374932.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3534957 + ... + 3543147.

Almost surely, 2^28988374932 is an apocalyptic number.

28988374932 is a gapful number since it is divisible by the number (22) 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 28988374932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41579446272).

28988374932 is an abundant number, since it is smaller than the sum of its proper divisors (54170517612).

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

28988374932 is a wasteful number, since it uses less digits than its factorization.

28988374932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8552 (or 8538 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 63.

The spelling of 28988374932 in words is "twenty-eight billion, nine hundred eighty-eight million, three hundred seventy-four thousand, nine hundred thirty-two".