13099856 has 100 divisors (see below), whose sum is σ = 33343104. Its totient is φ = 4939200.

The previous prime is 13099841. The next prime is 13099871. The reversal of 13099856 is 65899031.

13099856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13099841) and next prime (13099871).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 422561 + ... + 422591.

Almost surely, 2^13099856 is an apocalyptic number.

13099856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13099856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16671552).

13099856 is an abundant number, since it is smaller than the sum of its proper divisors (20243248).

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

13099856 is an equidigital number, since it uses as much as digits as its factorization.

13099856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 13099856 is about 3619.3723212734. The cubic root of 13099856 is about 235.7339719970.

The spelling of 13099856 in words is "thirteen million, ninety-nine thousand, eight hundred fifty-six".