13397724 has 30 divisors (see below), whose sum is σ = 35025144. Its totient is φ = 4465800.

The previous prime is 13397719. The next prime is 13397729. The reversal of 13397724 is 42779331.

It is an interprime number because it is at equal distance from previous prime (13397719) and next prime (13397729).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13397729) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 20352 + ... + 20999.

Almost surely, 2^13397724 is an apocalyptic number.

It is an amenable number.

13397724 is an abundant number, since it is smaller than the sum of its proper divisors (21627420).

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

13397724 is a wasteful number, since it uses less digits than its factorization.

13397724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41367 (or 41356 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 13397724 is about 3660.2901524333. The cubic root of 13397724 is about 237.5073253512.

The spelling of 13397724 in words is "thirteen million, three hundred ninety-seven thousand, seven hundred twenty-four".