11578987 has 8 divisors (see below), whose sum is σ = 13370336. Its totient is φ = 9821952.

The previous prime is 11578981. The next prime is 11579003. The reversal of 11578987 is 78987511.

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

It is not a de Polignac number, because 11578987 - 2¹⁹ = 11054699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11578981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7848 + ... + 9205.

It is an arithmetic number, because the mean of its divisors is an integer number (1671292).

Almost surely, 2^11578987 is an apocalyptic number.

11578987 is a deficient number, since it is larger than the sum of its proper divisors (1791349).

11578987 is an equidigital number, since it uses as much as digits as its factorization.

11578987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17157.

The product of its digits is 141120, while the sum is 46.

The square root of 11578987 is about 3402.7910602915. The cubic root of 11578987 is about 226.2334692805.

The spelling of 11578987 in words is "eleven million, five hundred seventy-eight thousand, nine hundred eighty-seven".