28881383711 has 8 divisors (see below), whose sum is σ = 28931193600. Its totient is φ = 28831600800.

The previous prime is 28881383653. The next prime is 28881383719. The reversal of 28881383711 is 11738318882.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28881383711 is a prime.

It is a super-2 number, since 2×28881383711² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28881383711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28881383719) 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, 4306661 + ... + 4313361.

It is an arithmetic number, because the mean of its divisors is an integer number (3616399200).

Almost surely, 2^28881383711 is an apocalyptic number.

28881383711 is a deficient number, since it is larger than the sum of its proper divisors (49809889).

28881383711 is an equidigital number, since it uses as much as digits as its factorization.

28881383711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13489.

The product of its digits is 516096, while the sum is 50.

The spelling of 28881383711 in words is "twenty-eight billion, eight hundred eighty-one million, three hundred eighty-three thousand, seven hundred eleven".