11681378 has 24 divisors (see below), whose sum is σ = 18720156. Its totient is φ = 5464800.

The previous prime is 11681353. The next prime is 11681399. The reversal of 11681378 is 87318611.

11681378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7491169 + 4190209 = 2737^2 + 2047^2 .

It is a super-3 number, since 3×11681378³ (a number of 22 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64448 + ... + 64628.

Almost surely, 2^11681378 is an apocalyptic number.

11681378 is a deficient number, since it is larger than the sum of its proper divisors (7038778).

11681378 is a wasteful number, since it uses less digits than its factorization.

11681378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 267 counting only the distinct ones).

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

The square root of 11681378 is about 3417.8030955571. The cubic root of 11681378 is about 226.8983612207.

Adding to 11681378 its reverse (87318611), we get a palindrome (98999989).

The spelling of 11681378 in words is "eleven million, six hundred eighty-one thousand, three hundred seventy-eight".