13213746 has 64 divisors (see below), whose sum is σ = 36153600. Its totient is φ = 3483648.

The previous prime is 13213703. The next prime is 13213747. The reversal of 13213746 is 64731231.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13213747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3570 + ... + 6258.

It is an arithmetic number, because the mean of its divisors is an integer number (564900).

Almost surely, 2^13213746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13213746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18076800).

13213746 is an abundant number, since it is smaller than the sum of its proper divisors (22939854).

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

13213746 is a wasteful number, since it uses less digits than its factorization.

13213746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720 (or 2714 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 13213746 is about 3635.0716636677. The cubic root of 13213746 is about 236.4151578830.

Adding to 13213746 its reverse (64731231), we get a palindrome (77944977).

The spelling of 13213746 in words is "thirteen million, two hundred thirteen thousand, seven hundred forty-six".