11931972 has 24 divisors (see below), whose sum is σ = 29983296. Its totient is φ = 3671328.

The previous prime is 11931967. The next prime is 11931989. The reversal of 11931972 is 27913911.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38088 + ... + 38399.

It is an arithmetic number, because the mean of its divisors is an integer number (1249304).

Almost surely, 2^11931972 is an apocalyptic number.

11931972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11931972 is an abundant number, since it is smaller than the sum of its proper divisors (18051324).

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

11931972 is a wasteful number, since it uses less digits than its factorization.

11931972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76507 (or 76505 counting only the distinct ones).

The product of its digits is 3402, while the sum is 33.

The square root of 11931972 is about 3454.2686635524. The cubic root of 11931972 is about 228.5094027385.

The spelling of 11931972 in words is "eleven million, nine hundred thirty-one thousand, nine hundred seventy-two".