28264541587 has 4 divisors (see below), whose sum is σ = 28311728400. Its totient is φ = 28217354776.

The previous prime is 28264541567. The next prime is 28264541621. The reversal of 28264541587 is 78514546282.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28264541587 is a prime.

It is a super-2 number, since 2×28264541587² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28264541537) 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, 23592508 + ... + 23593705.

It is an arithmetic number, because the mean of its divisors is an integer number (7077932100).

Almost surely, 2^28264541587 is an apocalyptic number.

28264541587 is a deficient number, since it is larger than the sum of its proper divisors (47186813).

28264541587 is an equidigital number, since it uses as much as digits as its factorization.

28264541587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47186812.

The product of its digits is 4300800, while the sum is 52.

The spelling of 28264541587 in words is "twenty-eight billion, two hundred sixty-four million, five hundred forty-one thousand, five hundred eighty-seven".