11971938 has 32 divisors (see below), whose sum is σ = 27498240. Its totient is φ = 3436560.

The previous prime is 11971913. The next prime is 11971943. The reversal of 11971938 is 83917911.

It is a junction number, because it is equal to n+sod(n) for n = 11971896 and 11971905.

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 15 ways as a sum of consecutive naturals, for example, 3520 + ... + 6027.

It is an arithmetic number, because the mean of its divisors is an integer number (859320).

Almost surely, 2^11971938 is an apocalyptic number.

11971938 is an abundant number, since it is smaller than the sum of its proper divisors (15526302).

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

11971938 is a wasteful number, since it uses less digits than its factorization.

11971938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9582.

The product of its digits is 13608, while the sum is 39.

The square root of 11971938 is about 3460.0488435859. The cubic root of 11971938 is about 228.7642482689.

The spelling of 11971938 in words is "eleven million, nine hundred seventy-one thousand, nine hundred thirty-eight".