13391616 has 144 divisors (see below), whose sum is σ = 42384384. Its totient is φ = 3674112.

The previous prime is 13391551. The next prime is 13391621. The reversal of 13391616 is 61619331.

13391616 = 14² + 15² + ... + 342².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252646 + ... + 252698.

It is an arithmetic number, because the mean of its divisors is an integer number (294336).

Almost surely, 2^13391616 is an apocalyptic number.

13391616 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 13391616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21192192).

13391616 is an abundant number, since it is smaller than the sum of its proper divisors (28992768).

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

13391616 is an equidigital number, since it uses as much as digits as its factorization.

13391616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 112 counting only the distinct ones).

The product of its digits is 2916, while the sum is 30.

The square root of 13391616 is about 3659.4556972315. The cubic root of 13391616 is about 237.4712268005.

The spelling of 13391616 in words is "thirteen million, three hundred ninety-one thousand, six hundred sixteen".