28991519104 has 32 divisors (see below), whose sum is σ = 58985416800. Its totient is φ = 14187336192.

The previous prime is 28991519099. The next prime is 28991519111. The reversal of 28991519104 is 40191519982.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2403519 + ... + 2415550.

It is an arithmetic number, because the mean of its divisors is an integer number (1843294275).

Almost surely, 2^28991519104 is an apocalyptic number.

It is an amenable number.

28991519104 is an abundant number, since it is smaller than the sum of its proper divisors (29993897696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28991519104 is an equidigital number, since it uses as much as digits as its factorization.

28991519104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4819130 (or 4819118 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 49.

The spelling of 28991519104 in words is "twenty-eight billion, nine hundred ninety-one million, five hundred nineteen thousand, one hundred four".