13775424 has 56 divisors (see below), whose sum is σ = 39258240. Its totient is φ = 4237824.

The previous prime is 13775407. The next prime is 13775441. The reversal of 13775424 is 42457731.

It is an interprime number because it is at equal distance from previous prime (13775407) and next prime (13775441).

It is a nialpdrome in base 8.

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, 264 + ... + 5255.

It is an arithmetic number, because the mean of its divisors is an integer number (701040).

Almost surely, 2^13775424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13775424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19629120).

13775424 is an abundant number, since it is smaller than the sum of its proper divisors (25482816).

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

13775424 is a wasteful number, since it uses less digits than its factorization.

13775424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5547 (or 5537 counting only the distinct ones).

The product of its digits is 23520, while the sum is 33.

The square root of 13775424 is about 3711.5258317840. The cubic root of 13775424 is about 239.7185589802.

The spelling of 13775424 in words is "thirteen million, seven hundred seventy-five thousand, four hundred twenty-four".