72115340 has 24 divisors (see below), whose sum is σ = 165210192. Its totient is φ = 26223680.

The previous prime is 72115333. The next prime is 72115397. The reversal of 72115340 is 4351127.

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, 163679 + ... + 164118.

It is an arithmetic number, because the mean of its divisors is an integer number (6883758).

Almost surely, 2^72115340 is an apocalyptic number.

It is an amenable number.

72115340 is an abundant number, since it is smaller than the sum of its proper divisors (93094852).

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

72115340 is a wasteful number, since it uses less digits than its factorization.

72115340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327817 (or 327815 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 72115340 is about 8492.0751292013. The cubic root of 72115340 is about 416.2387913427.

Adding to 72115340 its reverse (4351127), we get a palindrome (76466467).

It can be divided in two parts, 721 and 15340, that added together give a palindrome (16061).

The spelling of 72115340 in words is "seventy-two million, one hundred fifteen thousand, three hundred forty".