10991436 has 24 divisors (see below), whose sum is σ = 25703664. Its totient is φ = 3655680.

The previous prime is 10991429. The next prime is 10991459. The reversal of 10991436 is 63419901.

It is a junction number, because it is equal to n+sod(n) for n = 10991397 and 10991406.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7396 + ... + 8756.

It is an arithmetic number, because the mean of its divisors is an integer number (1070986).

Almost surely, 2^10991436 is an apocalyptic number.

It is an amenable number.

10991436 is an abundant number, since it is smaller than the sum of its proper divisors (14712228).

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

10991436 is a wasteful number, since it uses less digits than its factorization.

10991436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041 (or 2039 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 10991436 is about 3315.3334673906. Note that the first 3 decimals coincide. The cubic root of 10991436 is about 222.3402784193.

The spelling of 10991436 in words is "ten million, nine hundred ninety-one thousand, four hundred thirty-six".