28820541111 has 8 divisors (see below), whose sum is σ = 38622451824. Its totient is φ = 19116162240.

The previous prime is 28820541097. The next prime is 28820541131. The reversal of 28820541111 is 11114502882.

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

It is not a de Polignac number, because 28820541111 - 2¹⁴ = 28820524727 is a prime.

It is a super-2 number, since 2×28820541111² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28820541131) 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, 24382270 + ... + 24383451.

It is an arithmetic number, because the mean of its divisors is an integer number (4827806478).

Almost surely, 2^28820541111 is an apocalyptic number.

28820541111 is a deficient number, since it is larger than the sum of its proper divisors (9801910713).

28820541111 is a wasteful number, since it uses less digits than its factorization.

28820541111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48765921.

The product of its (nonzero) digits is 5120, while the sum is 33.

The spelling of 28820541111 in words is "twenty-eight billion, eight hundred twenty million, five hundred forty-one thousand, one hundred eleven".