11171990 has 8 divisors (see below), whose sum is σ = 20109600. Its totient is φ = 4468792.

The previous prime is 11171987. The next prime is 11172001. The reversal of 11171990 is 9917111.

11171990 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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558590 + ... + 558609.

It is an arithmetic number, because the mean of its divisors is an integer number (2513700).

Almost surely, 2^11171990 is an apocalyptic number.

11171990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11171990 is a deficient number, since it is larger than the sum of its proper divisors (8937610).

11171990 is a wasteful number, since it uses less digits than its factorization.

11171990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117206.

The product of its (nonzero) digits is 567, while the sum is 29.

The square root of 11171990 is about 3342.4526922606. The cubic root of 11171990 is about 223.5511179698.

The spelling of 11171990 in words is "eleven million, one hundred seventy-one thousand, nine hundred ninety".