10991972 has 12 divisors (see below), whose sum is σ = 19278000. Its totient is φ = 5483976.

The previous prime is 10991951. The next prime is 10991983. The reversal of 10991972 is 27919901.

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 3 ways as a sum of consecutive naturals, for example, 758 + ... + 4749.

It is an arithmetic number, because the mean of its divisors is an integer number (1606500).

Almost surely, 2^10991972 is an apocalyptic number.

It is an amenable number.

10991972 is a deficient number, since it is larger than the sum of its proper divisors (8286028).

10991972 is a wasteful number, since it uses less digits than its factorization.

10991972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010 (or 6008 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 10991972 is about 3315.4143029190. The cubic root of 10991972 is about 222.3438925195.

The spelling of 10991972 in words is "ten million, nine hundred ninety-one thousand, nine hundred seventy-two".