11381004 has 18 divisors (see below), whose sum is σ = 28768740. Its totient is φ = 3793656.

The previous prime is 11380979. The next prime is 11381011. The reversal of 11381004 is 40018311.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 158034 + ... + 158105.

Almost surely, 2^11381004 is an apocalyptic number.

It is an amenable number.

11381004 is an abundant number, since it is smaller than the sum of its proper divisors (17387736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11381004 is a wasteful number, since it uses less digits than its factorization.

11381004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316149 (or 316144 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 11381004 is about 3373.5743655654. The cubic root of 11381004 is about 224.9366340080.

Adding to 11381004 its reverse (40018311), we get a palindrome (51399315).

The spelling of 11381004 in words is "eleven million, three hundred eighty-one thousand, four".