28291113759 has 8 divisors (see below), whose sum is σ = 37722698800. Its totient is φ = 18860135616.

The previous prime is 28291113757. The next prime is 28291113769. The reversal of 28291113759 is 95731119282.

It is a happy number.

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

It is not a de Polignac number, because 28291113759 - 2¹ = 28291113757 is a prime.

It is a super-2 number, since 2×28291113759² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28291113757) 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, 28702 + ... + 239595.

It is an arithmetic number, because the mean of its divisors is an integer number (4715337350).

Almost surely, 2^28291113759 is an apocalyptic number.

28291113759 is a deficient number, since it is larger than the sum of its proper divisors (9431585041).

28291113759 is a wasteful number, since it uses less digits than its factorization.

28291113759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303449.

The product of its digits is 272160, while the sum is 48.

The spelling of 28291113759 in words is "twenty-eight billion, two hundred ninety-one million, one hundred thirteen thousand, seven hundred fifty-nine".