28291109283 has 24 divisors (see below), whose sum is σ = 43281810000. Its totient is φ = 17745928704.

The previous prime is 28291109279. The next prime is 28291109309. The reversal of 28291109283 is 38290119282.

It is a happy number.

28291109283 is a `hidden beast` number, since 282 + 91 + 1 + 0 + 9 + 283 = 666.

It is not a de Polignac number, because 28291109283 - 2² = 28291109279 is a prime.

It is a super-3 number, since 3×28291109283³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28291109243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 515343 + ... + 567591.

It is an arithmetic number, because the mean of its divisors is an integer number (1803408750).

Almost surely, 2^28291109283 is an apocalyptic number.

28291109283 is a deficient number, since it is larger than the sum of its proper divisors (14990700717).

28291109283 is a wasteful number, since it uses less digits than its factorization.

28291109283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55811 (or 55808 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

Subtracting 28291109283 from its reverse (38290119282), we obtain a palindrome (9999009999).

The spelling of 28291109283 in words is "twenty-eight billion, two hundred ninety-one million, one hundred nine thousand, two hundred eighty-three".