11378861 has 4 divisors (see below), whose sum is σ = 12254172. Its totient is φ = 10503552.

The previous prime is 11378849. The next prime is 11378881. The reversal of 11378861 is 16887311.

11378861 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 can be written as a sum of positive squares in 2 ways, for example, as 4972900 + 6405961 = 2230^2 + 2531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11378861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11378821) 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, 437636 + ... + 437661.

It is an arithmetic number, because the mean of its divisors is an integer number (3063543).

Almost surely, 2^11378861 is an apocalyptic number.

It is an amenable number.

11378861 is a deficient number, since it is larger than the sum of its proper divisors (875311).

11378861 is an equidigital number, since it uses as much as digits as its factorization.

11378861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875310.

The product of its digits is 8064, while the sum is 35.

The square root of 11378861 is about 3373.2567349670. The cubic root of 11378861 is about 224.9225148827.

The spelling of 11378861 in words is "eleven million, three hundred seventy-eight thousand, eight hundred sixty-one".