10991148 has 48 divisors (see below), whose sum is σ = 30589440. Its totient is φ = 3003264.

The previous prime is 10991131. The next prime is 10991153. The reversal of 10991148 is 84119901.

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 15 ways as a sum of consecutive naturals, for example, 913 + ... + 4776.

It is an arithmetic number, because the mean of its divisors is an integer number (637280).

Almost surely, 2^10991148 is an apocalyptic number.

It is an amenable number.

10991148 is an abundant number, since it is smaller than the sum of its proper divisors (19598292).

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

10991148 is a wasteful number, since it uses less digits than its factorization.

10991148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5726 (or 5724 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 10991148 is about 3315.2900325613. The cubic root of 10991148 is about 222.3383364663.

The spelling of 10991148 in words is "ten million, nine hundred ninety-one thousand, one hundred forty-eight".