11878591 has 16 divisors (see below), whose sum is σ = 13099360. Its totient is φ = 10730880.

The previous prime is 11878589. The next prime is 11878609. The reversal of 11878591 is 19587811.

It is a cyclic number.

It is not a de Polignac number, because 11878591 - 2¹ = 11878589 is a prime.

It is a super-2 number, since 2×11878591² = 282201848290562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11878501) 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 15 ways as a sum of consecutive naturals, for example, 42745 + ... + 43021.

It is an arithmetic number, because the mean of its divisors is an integer number (818710).

Almost surely, 2^11878591 is an apocalyptic number.

11878591 is a deficient number, since it is larger than the sum of its proper divisors (1220769).

11878591 is a wasteful number, since it uses less digits than its factorization.

11878591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394.

The product of its digits is 20160, while the sum is 40.

The square root of 11878591 is about 3446.5331856809. The cubic root of 11878591 is about 228.1681264809.

The spelling of 11878591 in words is "eleven million, eight hundred seventy-eight thousand, five hundred ninety-one".