11191938 has 16 divisors (see below), whose sum is σ = 23357376. Its totient is φ = 3568400.

The previous prime is 11191937. The next prime is 11191951. The reversal of 11191938 is 83919111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11191899 and 11191908.

It is not an unprimeable number, because it can be changed into a prime (11191937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40413 + ... + 40688.

It is an arithmetic number, because the mean of its divisors is an integer number (1459836).

Almost surely, 2^11191938 is an apocalyptic number.

11191938 is an abundant number, since it is smaller than the sum of its proper divisors (12165438).

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

11191938 is a wasteful number, since it uses less digits than its factorization.

11191938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81129.

The product of its digits is 1944, while the sum is 33.

The square root of 11191938 is about 3345.4353976725. The cubic root of 11191938 is about 223.6840917787.

The spelling of 11191938 in words is "eleven million, one hundred ninety-one thousand, nine hundred thirty-eight".