11911390 has 16 divisors (see below), whose sum is σ = 22702032. Its totient is φ = 4484224.

The previous prime is 11911369. The next prime is 11911421. The reversal of 11911390 is 9311911.

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, 34864 + ... + 35203.

It is an arithmetic number, because the mean of its divisors is an integer number (1418877).

Almost surely, 2^11911390 is an apocalyptic number.

11911390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11911390 is a deficient number, since it is larger than the sum of its proper divisors (10790642).

11911390 is a wasteful number, since it uses less digits than its factorization.

11911390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70091.

The product of its (nonzero) digits is 243, while the sum is 25.

The square root of 11911390 is about 3451.2881653087. The cubic root of 11911390 is about 228.3779383735.

The spelling of 11911390 in words is "eleven million, nine hundred eleven thousand, three hundred ninety".