13172736 has 68 divisors (see below), whose sum is σ = 35651312. Its totient is φ = 4325376.

The previous prime is 13172729. The next prime is 13172791. The reversal of 13172736 is 63727131.

It is a nialpdrome in base 8 and base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196575 + ... + 196641.

It is an arithmetic number, because the mean of its divisors is an integer number (524284).

Almost surely, 2^13172736 is an apocalyptic number.

13172736 is a gapful number since it is divisible by the number (16) 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 13172736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17825656).

13172736 is an abundant number, since it is smaller than the sum of its proper divisors (22478576).

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

13172736 is an frugal number, since it uses more digits than its factorization.

13172736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 72 counting only the distinct ones).

The product of its digits is 5292, while the sum is 30.

The square root of 13172736 is about 3629.4264009620. The cubic root of 13172736 is about 236.1703261471.

Adding to 13172736 its reverse (63727131), we get a palindrome (76899867).

The spelling of 13172736 in words is "thirteen million, one hundred seventy-two thousand, seven hundred thirty-six".