28988031040 has 112 divisors (see below), whose sum is σ = 70395998400. Its totient is φ = 11366500352.

The previous prime is 28988031031. The next prime is 28988031043. The reversal of 28988031040 is 4013088982.

It is not an unprimeable number, because it can be changed into a prime (28988031043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7342347 + ... + 7346293.

It is an arithmetic number, because the mean of its divisors is an integer number (628535700).

Almost surely, 2^28988031040 is an apocalyptic number.

28988031040 is a gapful number since it is divisible by the number (20) 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 28988031040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35197999200).

28988031040 is an abundant number, since it is smaller than the sum of its proper divisors (41407967360).

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

28988031040 is a wasteful number, since it uses less digits than its factorization.

28988031040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4412 (or 4402 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 28988031040 in words is "twenty-eight billion, nine hundred eighty-eight million, thirty-one thousand, forty".