10991992 has 16 divisors (see below), whose sum is σ = 22483800. Its totient is φ = 4996320.

The previous prime is 10991989. The next prime is 10991993. The reversal of 10991992 is 29919901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10991993) 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, 62367 + ... + 62542.

Almost surely, 2^10991992 is an apocalyptic number.

It is an amenable number.

10991992 is an abundant number, since it is smaller than the sum of its proper divisors (11491808).

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

10991992 is a wasteful number, since it uses less digits than its factorization.

10991992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124926 (or 124922 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 10991992 is about 3315.4173191319. The cubic root of 10991992 is about 222.3440273717.

It can be divided in two parts, 109919 and 92, that added together give a palindrome (110011).

The spelling of 10991992 in words is "ten million, nine hundred ninety-one thousand, nine hundred ninety-two".