11309881 has 8 divisors (see below), whose sum is σ = 12362400. Its totient is φ = 10261440.

The previous prime is 11309873. The next prime is 11309897. The reversal of 11309881 is 18890311.

11309881 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 not a de Polignac number, because 11309881 - 2³ = 11309873 is a prime.

It is a super-2 number, since 2×11309881² = 255826816468322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11309381) 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, 10590 + ... + 11608.

It is an arithmetic number, because the mean of its divisors is an integer number (1545300).

Almost surely, 2^11309881 is an apocalyptic number.

11309881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11309881 is a deficient number, since it is larger than the sum of its proper divisors (1052519).

11309881 is a wasteful number, since it uses less digits than its factorization.

11309881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 11309881 is about 3363.0166517578. The cubic root of 11309881 is about 224.4670910735.

It can be divided in two parts, 1130 and 9881, that added together give a palindrome (11011).

The spelling of 11309881 in words is "eleven million, three hundred nine thousand, eight hundred eighty-one".