11471990 has 16 divisors (see below), whose sum is σ = 20783952. Its totient is φ = 4558944.

The previous prime is 11471989. The next prime is 11472031. The reversal of 11471990 is 9917411.

It is a happy number.

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, 2084 + ... + 5223.

It is an arithmetic number, because the mean of its divisors is an integer number (1298997).

Almost surely, 2^11471990 is an apocalyptic number.

11471990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11471990 is a deficient number, since it is larger than the sum of its proper divisors (9311962).

11471990 is a wasteful number, since it uses less digits than its factorization.

11471990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7471.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 11471990 is about 3387.0326245845. The cubic root of 11471990 is about 225.5344660471.

The spelling of 11471990 in words is "eleven million, four hundred seventy-one thousand, nine hundred ninety".