10991100 has 36 divisors (see below), whose sum is σ = 31801784. Its totient is φ = 2930880.

The previous prime is 10991089. The next prime is 10991107. The reversal of 10991100 is 119901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10991107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18019 + ... + 18618.

Almost surely, 2^10991100 is an apocalyptic number.

10991100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10991100 is an abundant number, since it is smaller than the sum of its proper divisors (20810684).

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

10991100 is a wasteful number, since it uses less digits than its factorization.

10991100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36654 (or 36647 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 10991100 is about 3315.2827933677. The cubic root of 10991100 is about 222.3380128041.

The spelling of 10991100 in words is "ten million, nine hundred ninety-one thousand, one hundred".