1028736131587 has 4 divisors (see below), whose sum is σ = 1028739516336. Its totient is φ = 1028732746840.

The previous prime is 1028736131573. The next prime is 1028736131629. The reversal of 1028736131587 is 7851316378201.

1028736131587 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-1028736131587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028736131557) 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, 1185964 + ... + 1861177.

It is an arithmetic number, because the mean of its divisors is an integer number (257184879084).

Almost surely, 2^{1028736131587} is an apocalyptic number.

1028736131587 is a deficient number, since it is larger than the sum of its proper divisors (3384749).

1028736131587 is an equidigital number, since it uses as much as digits as its factorization.

1028736131587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3384748.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 1028736131587 in words is "one trillion, twenty-eight billion, seven hundred thirty-six million, one hundred thirty-one thousand, five hundred eighty-seven".