11971950 has 24 divisors (see below), whose sum is σ = 29690808. Its totient is φ = 3192480.

The previous prime is 11971943. The next prime is 11971987. The reversal of 11971950 is 5917911.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39757 + ... + 40056.

It is an arithmetic number, because the mean of its divisors is an integer number (1237117).

Almost surely, 2^11971950 is an apocalyptic number.

11971950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11971950 is an abundant number, since it is smaller than the sum of its proper divisors (17718858).

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

11971950 is a wasteful number, since it uses less digits than its factorization.

11971950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79828 (or 79823 counting only the distinct ones).

The product of its (nonzero) digits is 2835, while the sum is 33.

The square root of 11971950 is about 3460.0505776650. The cubic root of 11971950 is about 228.7643247024.

It can be divided in two parts, 11971 and 950, that added together give a palindrome (12921).

The spelling of 11971950 in words is "eleven million, nine hundred seventy-one thousand, nine hundred fifty".