28880957191 has 16 divisors (see below), whose sum is σ = 29537172000. Its totient is φ = 28230795648.

The previous prime is 28880957159. The next prime is 28880957227. The reversal of 28880957191 is 19175908882.

It is a cyclic number.

It is not a de Polignac number, because 28880957191 - 2⁵ = 28880957159 is a prime.

It is a super-3 number, since 3×28880957191³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28880957111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8172861 + ... + 8176393.

It is an arithmetic number, because the mean of its divisors is an integer number (1846073250).

Almost surely, 2^28880957191 is an apocalyptic number.

28880957191 is a deficient number, since it is larger than the sum of its proper divisors (656214809).

28880957191 is a wasteful number, since it uses less digits than its factorization.

28880957191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4338.

The product of its (nonzero) digits is 2903040, while the sum is 58.

The spelling of 28880957191 in words is "twenty-eight billion, eight hundred eighty million, nine hundred fifty-seven thousand, one hundred ninety-one".