72240252 has 48 divisors (see below), whose sum is σ = 193519872. Its totient is φ = 20545920.

The previous prime is 72240251. The next prime is 72240257. The reversal of 72240252 is 25204227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72240251) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 17727 + ... + 21417.

It is an arithmetic number, because the mean of its divisors is an integer number (4031664).

Almost surely, 2^72240252 is an apocalyptic number.

It is an amenable number.

72240252 is an abundant number, since it is smaller than the sum of its proper divisors (121279620).

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

72240252 is a wasteful number, since it uses less digits than its factorization.

72240252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938 (or 3936 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 72240252 is about 8499.4265688928. The cubic root of 72240252 is about 416.4789770848.

Adding to 72240252 its reverse (25204227), we get a palindrome (97444479).

The spelling of 72240252 in words is "seventy-two million, two hundred forty thousand, two hundred fifty-two".