13749312 has 56 divisors (see below), whose sum is σ = 38303200. Its totient is φ = 4340736.

The previous prime is 13749299. The next prime is 13749319. The reversal of 13749312 is 21394731.

It is a self number, because there is not a number n which added to its sum of digits gives 13749312.

It is not an unprimeable number, because it can be changed into a prime (13749319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1764 + ... + 5532.

Almost surely, 2^13749312 is an apocalyptic number.

13749312 is a gapful number since it is divisible by the number (12) 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 13749312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19151600).

13749312 is an abundant number, since it is smaller than the sum of its proper divisors (24553888).

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

13749312 is a wasteful number, since it uses less digits than its factorization.

13749312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3803 (or 3793 counting only the distinct ones).

The product of its digits is 4536, while the sum is 30.

The square root of 13749312 is about 3708.0064724863. The cubic root of 13749312 is about 239.5669970327.

The spelling of 13749312 in words is "thirteen million, seven hundred forty-nine thousand, three hundred twelve".