10991816 has 16 divisors (see below), whose sum is σ = 22483440. Its totient is φ = 4996240.

The previous prime is 10991807. The next prime is 10991831. The reversal of 10991816 is 61819901.

10991816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62366 + ... + 62541.

It is an arithmetic number, because the mean of its divisors is an integer number (1405215).

Almost surely, 2^10991816 is an apocalyptic number.

It is an amenable number.

10991816 is an abundant number, since it is smaller than the sum of its proper divisors (11491624).

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

10991816 is a wasteful number, since it uses less digits than its factorization.

10991816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124924 (or 124920 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 10991816 is about 3315.3907763641. The cubic root of 10991816 is about 222.3428406667.

The spelling of 10991816 in words is "ten million, nine hundred ninety-one thousand, eight hundred sixteen".