11382981 has 8 divisors (see below), whose sum is σ = 15319584. Its totient is φ = 7517520.

The previous prime is 11382967. The next prime is 11382989. The reversal of 11382981 is 18928311.

11382981 is digitally balanced in base 2 and base 4, because in such bases 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 not a de Polignac number, because 11382981 - 2⁵ = 11382949 is a prime.

It is a super-2 number, since 2×11382981² = 259144512892722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11382989) 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, 17410 + ... + 18051.

It is an arithmetic number, because the mean of its divisors is an integer number (1914948).

Almost surely, 2^11382981 is an apocalyptic number.

It is an amenable number.

11382981 is a deficient number, since it is larger than the sum of its proper divisors (3936603).

11382981 is a wasteful number, since it uses less digits than its factorization.

11382981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35571.

The product of its digits is 3456, while the sum is 33.

The square root of 11382981 is about 3373.8673655021. The cubic root of 11382981 is about 224.9496578730.

The spelling of 11382981 in words is "eleven million, three hundred eighty-two thousand, nine hundred eighty-one".