13631244 has 48 divisors (see below), whose sum is σ = 35648256. Its totient is φ = 4017600.

The previous prime is 13631221. The next prime is 13631257. The reversal of 13631244 is 44213631.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 2.

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, 3489 + ... + 6279.

It is an arithmetic number, because the mean of its divisors is an integer number (742672).

Almost surely, 2^13631244 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 13631244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17824128).

13631244 is an abundant number, since it is smaller than the sum of its proper divisors (22017012).

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

13631244 is a wasteful number, since it uses less digits than its factorization.

13631244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846 (or 2844 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 13631244 is about 3692.0514622632. The cubic root of 13631244 is about 238.8792887274.

Adding to 13631244 its reverse (44213631), we get a palindrome (57844875).

The spelling of 13631244 in words is "thirteen million, six hundred thirty-one thousand, two hundred forty-four".