10991472 has 20 divisors (see below), whose sum is σ = 28394760. Its totient is φ = 3663808.

The previous prime is 10991471. The next prime is 10991501. The reversal of 10991472 is 27419901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10991471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114447 + ... + 114542.

It is an arithmetic number, because the mean of its divisors is an integer number (1419738).

Almost surely, 2^10991472 is an apocalyptic number.

10991472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10991472 is an abundant number, since it is smaller than the sum of its proper divisors (17403288).

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

10991472 is a wasteful number, since it uses less digits than its factorization.

10991472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229000 (or 228994 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 10991472 is about 3315.3388967042. The cubic root of 10991472 is about 222.3405211611.

The spelling of 10991472 in words is "ten million, nine hundred ninety-one thousand, four hundred seventy-two".