11878864 has 20 divisors (see below), whose sum is σ = 23809860. Its totient is φ = 5734400.

The previous prime is 11878861. The next prime is 11878871. The reversal of 11878864 is 46887811.

It can be written as a sum of positive squares in 2 ways, for example, as 10188864 + 1690000 = 3192^2 + 1300^2 .

It is a super-2 number, since 2×11878864² = 282214819860992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11878864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11878861) 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, 12337 + ... + 13264.

It is an arithmetic number, because the mean of its divisors is an integer number (1190493).

Almost surely, 2^11878864 is an apocalyptic number.

It is an amenable number.

11878864 is an abundant number, since it is smaller than the sum of its proper divisors (11930996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11878864 is a wasteful number, since it uses less digits than its factorization.

11878864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25638 (or 25632 counting only the distinct ones).

The product of its digits is 86016, while the sum is 43.

The square root of 11878864 is about 3446.5727904688. The cubic root of 11878864 is about 228.1698744273.

The spelling of 11878864 in words is "eleven million, eight hundred seventy-eight thousand, eight hundred sixty-four".