28125991034 has 8 divisors (see below), whose sum is σ = 42189825888. Its totient is φ = 14062715740.

The previous prime is 28125991031. The next prime is 28125991039. The reversal of 28125991034 is 43019952182.

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

It is not an unprimeable number, because it can be changed into a prime (28125991031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24329 + ... + 238419.

It is an arithmetic number, because the mean of its divisors is an integer number (5273728236).

Almost surely, 2^28125991034 is an apocalyptic number.

28125991034 is a deficient number, since it is larger than the sum of its proper divisors (14063834854).

28125991034 is a wasteful number, since it uses less digits than its factorization.

28125991034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279780.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 28125991034 in words is "twenty-eight billion, one hundred twenty-five million, nine hundred ninety-one thousand, thirty-four".