13233720 has 32 divisors (see below), whose sum is σ = 39701520. Its totient is φ = 3528960.

The previous prime is 13233713. The next prime is 13233757. The reversal of 13233720 is 2733231.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55021 + ... + 55260.

Almost surely, 2^13233720 is an apocalyptic number.

13233720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13233720 is an abundant number, since it is smaller than the sum of its proper divisors (26467800).

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

13233720 is a wasteful number, since it uses less digits than its factorization.

13233720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110295 (or 110291 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 13233720 is about 3637.8180273345. The cubic root of 13233720 is about 236.5342202344.

Adding to 13233720 its reverse (2733231), we get a palindrome (15966951).

The spelling of 13233720 in words is "thirteen million, two hundred thirty-three thousand, seven hundred twenty".