28325187887 has 8 divisors (see below), whose sum is σ = 28358860992. Its totient is φ = 28291536000.

The previous prime is 28325187841. The next prime is 28325187889. The reversal of 28325187887 is 78878152382.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28325187887 - 2¹⁰ = 28325186863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28325187889) 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, 5572187 + ... + 5577267.

It is an arithmetic number, because the mean of its divisors is an integer number (3544857624).

Almost surely, 2^28325187887 is an apocalyptic number.

28325187887 is a deficient number, since it is larger than the sum of its proper divisors (33673105).

28325187887 is a wasteful number, since it uses less digits than its factorization.

28325187887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10609.

The product of its digits is 12042240, while the sum is 59.

The spelling of 28325187887 in words is "twenty-eight billion, three hundred twenty-five million, one hundred eighty-seven thousand, eight hundred eighty-seven".