28258255587 has 8 divisors (see below), whose sum is σ = 37723458304. Its totient is φ = 18815944968.

The previous prime is 28258255583. The next prime is 28258255589. The reversal of 28258255587 is 78555285282.

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

It is not a de Polignac number, because 28258255587 - 2² = 28258255583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28258255583) 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, 5720143 + ... + 5725080.

It is an arithmetic number, because the mean of its divisors is an integer number (4715432288).

Almost surely, 2^28258255587 is an apocalyptic number.

28258255587 is a deficient number, since it is larger than the sum of its proper divisors (9465202717).

28258255587 is a wasteful number, since it uses less digits than its factorization.

28258255587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11446049.

The product of its digits is 17920000, while the sum is 57.

The spelling of 28258255587 in words is "twenty-eight billion, two hundred fifty-eight million, two hundred fifty-five thousand, five hundred eighty-seven".