13309992 has 48 divisors (see below), whose sum is σ = 36216180. Its totient is φ = 4416000.

The previous prime is 13309991. The next prime is 13310009. The reversal of 13309992 is 29990331.

It can be written as a sum of positive squares in 2 ways, for example, as 12489156 + 820836 = 3534^2 + 906^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (13309991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28642 + ... + 29102.

Almost surely, 2^13309992 is an apocalyptic number.

13309992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13309992 is an abundant number, since it is smaller than the sum of its proper divisors (22906188).

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

13309992 is a wasteful number, since it uses less digits than its factorization.

13309992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 13309992 is about 3648.2861729859. The cubic root of 13309992 is about 236.9877684228.

The spelling of 13309992 in words is "thirteen million, three hundred nine thousand, nine hundred ninety-two".