13047720 has 128 divisors (see below), whose sum is σ = 45792000. Its totient is φ = 2972928.

The previous prime is 13047707. The next prime is 13047751. The reversal of 13047720 is 2774031.

13047720 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41002 + ... + 41318.

It is an arithmetic number, because the mean of its divisors is an integer number (357750).

Almost surely, 2^13047720 is an apocalyptic number.

13047720 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 13047720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22896000).

13047720 is an abundant number, since it is smaller than the sum of its proper divisors (32744280).

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

13047720 is a wasteful number, since it uses less digits than its factorization.

13047720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 13047720 is about 3612.1627870294. The cubic root of 13047720 is about 235.4208243538.

Subtracting from 13047720 its product of nonzero digits (1176), we obtain a square (13046544 = 3612²).

The spelling of 13047720 in words is "thirteen million, forty-seven thousand, seven hundred twenty".