11810381 has 8 divisors (see below), whose sum is σ = 13562400. Its totient is φ = 10171440.

The previous prime is 11810371. The next prime is 11810401. The reversal of 11810381 is 18301811.

11810381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11810381 is a prime.

It is a super-2 number, since 2×11810381² = 278970198730322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11810311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28046 + ... + 28463.

It is an arithmetic number, because the mean of its divisors is an integer number (1695300).

Almost surely, 2^11810381 is an apocalyptic number.

11810381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11810381 is a deficient number, since it is larger than the sum of its proper divisors (1752019).

11810381 is a wasteful number, since it uses less digits than its factorization.

11810381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56539.

The product of its (nonzero) digits is 192, while the sum is 23.

The square root of 11810381 is about 3436.6234882512. The cubic root of 11810381 is about 227.7305540191.

The spelling of 11810381 in words is "eleven million, eight hundred ten thousand, three hundred eighty-one".