28750791139 has 8 divisors (see below), whose sum is σ = 33991083360. Its totient is φ = 23793758016.

The previous prime is 28750791109. The next prime is 28750791151. The reversal of 28750791139 is 93119705782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28750791139 - 2¹³ = 28750782947 is a prime.

It is a super-2 number, since 2×28750791139² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28750791109) 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, 70814554 + ... + 70814959.

It is an arithmetic number, because the mean of its divisors is an integer number (4248885420).

Almost surely, 2^28750791139 is an apocalyptic number.

28750791139 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28750791139 is a deficient number, since it is larger than the sum of its proper divisors (5240292221).

28750791139 is a wasteful number, since it uses less digits than its factorization.

28750791139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141629549.

The product of its (nonzero) digits is 952560, while the sum is 52.

The spelling of 28750791139 in words is "twenty-eight billion, seven hundred fifty million, seven hundred ninety-one thousand, one hundred thirty-nine".