13091904 has 168 divisors, whose sum is σ = 45646848. Its totient is φ = 3502080.

The previous prime is 13091879. The next prime is 13091929. The reversal of 13091904 is 40919031.

It is an interprime number because it is at equal distance from previous prime (13091879) and next prime (13091929).

It is a tau number, because it is divible by the number of its divisors (168).

It is a zygodrome in base 6.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68449 + ... + 68639.

Almost surely, 2^13091904 is an apocalyptic number.

13091904 is a gapful number since it is divisible by the number (14) 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 13091904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22823424).

13091904 is an abundant number, since it is smaller than the sum of its proper divisors (32554944).

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

13091904 is a wasteful number, since it uses less digits than its factorization.

13091904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 13091904 is about 3618.2736214941. The cubic root of 13091904 is about 235.6862631780.

The spelling of 13091904 in words is "thirteen million, ninety-one thousand, nine hundred four".