11381880 has 32 divisors (see below), whose sum is σ = 34146000. Its totient is φ = 3035136.

The previous prime is 11381879. The next prime is 11381899. The reversal of 11381880 is 8818311.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47305 + ... + 47544.

Almost surely, 2^11381880 is an apocalyptic number.

11381880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11381880 is an abundant number, since it is smaller than the sum of its proper divisors (22764120).

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

11381880 is a wasteful number, since it uses less digits than its factorization.

11381880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94863 (or 94859 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 30.

The square root of 11381880 is about 3373.7041956876. The cubic root of 11381880 is about 224.9424050113.

The spelling of 11381880 in words is "eleven million, three hundred eighty-one thousand, eight hundred eighty".