10991026 has 16 divisors (see below), whose sum is σ = 16932384. Its totient is φ = 5349024.

The previous prime is 10991023. The next prime is 10991059. The reversal of 10991026 is 62019901.

It is a junction number, because it is equal to n+sod(n) for n = 10990985 and 10991003.

It is not an unprimeable number, because it can be changed into a prime (10991021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11665 + ... + 12571.

It is an arithmetic number, because the mean of its divisors is an integer number (1058274).

Almost surely, 2^10991026 is an apocalyptic number.

10991026 is a deficient number, since it is larger than the sum of its proper divisors (5941358).

10991026 is an equidigital number, since it uses as much as digits as its factorization.

10991026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 10991026 is about 3315.2716329134. The cubic root of 10991026 is about 222.3375138231.

The spelling of 10991026 in words is "ten million, nine hundred ninety-one thousand, twenty-six".