28432541587 has 4 divisors (see below), whose sum is σ = 28613640736. Its totient is φ = 28251442440.

The previous prime is 28432541573. The next prime is 28432541609. The reversal of 28432541587 is 78514523482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28432541587 - 2²³ = 28424152979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28432541587.

It is not an unprimeable number, because it can be changed into a prime (28432541567) 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, 90549339 + ... + 90549652.

It is an arithmetic number, because the mean of its divisors is an integer number (7153410184).

Almost surely, 2^28432541587 is an apocalyptic number.

28432541587 is a deficient number, since it is larger than the sum of its proper divisors (181099149).

28432541587 is a wasteful number, since it uses less digits than its factorization.

28432541587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181099148.

The product of its digits is 2150400, while the sum is 49.

The spelling of 28432541587 in words is "twenty-eight billion, four hundred thirty-two million, five hundred forty-one thousand, five hundred eighty-seven".