13915520 has 64 divisors (see below), whose sum is σ = 35251200. Its totient is φ = 5234688.

The previous prime is 13915519. The next prime is 13915541. The reversal of 13915520 is 2551931.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 13915520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10241 + ... + 11519.

It is an arithmetic number, because the mean of its divisors is an integer number (550800).

Almost surely, 2^13915520 is an apocalyptic number.

13915520 is a gapful number since it is divisible by the number (10) 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 13915520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17625600).

13915520 is an abundant number, since it is smaller than the sum of its proper divisors (21335680).

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

13915520 is a wasteful number, since it uses less digits than its factorization.

13915520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315 (or 1303 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 13915520 is about 3730.3511899016. The cubic root of 13915520 is about 240.5284651281.

The spelling of 13915520 in words is "thirteen million, nine hundred fifteen thousand, five hundred twenty".