72340252 has 12 divisors (see below), whose sum is σ = 127009960. Its totient is φ = 36051696.

The previous prime is 72340243. The next prime is 72340259. The reversal of 72340252 is 25204327.

It is a super-2 number, since 2×72340252² = 10466224118847008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72340259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28227 + ... + 30682.

Almost surely, 2^72340252 is an apocalyptic number.

It is an amenable number.

72340252 is a deficient number, since it is larger than the sum of its proper divisors (54669708).

72340252 is a wasteful number, since it uses less digits than its factorization.

72340252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59220 (or 59218 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 72340252 is about 8505.3072842784. The cubic root of 72340252 is about 416.6710615714.

Adding to 72340252 its reverse (25204327), we get a palindrome (97544579).

The spelling of 72340252 in words is "seventy-two million, three hundred forty thousand, two hundred fifty-two".