11809972 has 12 divisors (see below), whose sum is σ = 21107520. Its totient is φ = 5779256.

The previous prime is 11809949. The next prime is 11809979. The reversal of 11809972 is 27990811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11809979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31222 + ... + 31597.

It is an arithmetic number, because the mean of its divisors is an integer number (1758960).

Almost surely, 2^11809972 is an apocalyptic number.

It is an amenable number.

11809972 is a deficient number, since it is larger than the sum of its proper divisors (9297548).

11809972 is a wasteful number, since it uses less digits than its factorization.

11809972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62870 (or 62868 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 11809972 is about 3436.5639816538. The cubic root of 11809972 is about 227.7279251772.

The spelling of 11809972 in words is "eleven million, eight hundred nine thousand, nine hundred seventy-two".