28881253109 has 8 divisors (see below), whose sum is σ = 29574842880. Its totient is φ = 28190959056.

The previous prime is 28881253073. The next prime is 28881253117. The reversal of 28881253109 is 90135218882.

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

It is a cyclic number.

It is not a de Polignac number, because 28881253109 - 2¹² = 28881249013 is a prime.

It is a super-3 number, since 3×28881253109³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28881253129) 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, 806189 + ... + 841250.

It is an arithmetic number, because the mean of its divisors is an integer number (3696855360).

Almost surely, 2^28881253109 is an apocalyptic number.

It is an amenable number.

28881253109 is a deficient number, since it is larger than the sum of its proper divisors (693589771).

28881253109 is a wasteful number, since it uses less digits than its factorization.

28881253109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647859.

The product of its (nonzero) digits is 276480, while the sum is 47.

The spelling of 28881253109 in words is "twenty-eight billion, eight hundred eighty-one million, two hundred fifty-three thousand, one hundred nine".