11878641 has 6 divisors (see below), whose sum is σ = 17158050. Its totient is φ = 7919088.

The previous prime is 11878627. The next prime is 11878651. The reversal of 11878641 is 14687811.

11878641 is a `hidden beast` number, since 1 + 1 + 8 + 7 + 8 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10112400 + 1766241 = 3180^2 + 1329^2 .

It is not a de Polignac number, because 11878641 - 2⁵ = 11878609 is a prime.

It is a super-2 number, since 2×11878641² = 282204224013762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11878596 and 11878605.

It is not an unprimeable number, because it can be changed into a prime (11878651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 659916 + ... + 659933.

It is an arithmetic number, because the mean of its divisors is an integer number (2859675).

Almost surely, 2^11878641 is an apocalyptic number.

It is an amenable number.

11878641 is a deficient number, since it is larger than the sum of its proper divisors (5279409).

11878641 is a wasteful number, since it uses less digits than its factorization.

11878641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319855 (or 1319852 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 11878641 is about 3446.5404393391. The cubic root of 11878641 is about 228.1684466196.

The spelling of 11878641 in words is "eleven million, eight hundred seventy-eight thousand, six hundred forty-one".