13720236 has 24 divisors (see below), whose sum is σ = 33406464. Its totient is φ = 4374480.

The previous prime is 13720211. The next prime is 13720247. The reversal of 13720236 is 63202731.

13720236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24580 + ... + 25131.

It is an arithmetic number, because the mean of its divisors is an integer number (1391936).

Almost surely, 2^13720236 is an apocalyptic number.

It is an amenable number.

13720236 is an abundant number, since it is smaller than the sum of its proper divisors (19686228).

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

13720236 is a wasteful number, since it uses less digits than its factorization.

13720236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49741 (or 49739 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 13720236 is about 3704.0836923590. The cubic root of 13720236 is about 239.3980051606.

Adding to 13720236 its reverse (63202731), we get a palindrome (76922967).

The spelling of 13720236 in words is "thirteen million, seven hundred twenty thousand, two hundred thirty-six".