72068140 has 24 divisors (see below), whose sum is σ = 159309360. Its totient is φ = 27309888.

The previous prime is 72068137. The next prime is 72068141. The reversal of 72068140 is 4186027.

It is a junction number, because it is equal to n+sod(n) for n = 72068099 and 72068108.

It is not an unprimeable number, because it can be changed into a prime (72068141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94447 + ... + 95206.

It is an arithmetic number, because the mean of its divisors is an integer number (6637890).

Almost surely, 2^72068140 is an apocalyptic number.

It is an amenable number.

72068140 is an abundant number, since it is smaller than the sum of its proper divisors (87241220).

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

72068140 is a wasteful number, since it uses less digits than its factorization.

72068140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189681 (or 189679 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 72068140 is about 8489.2956127113. The cubic root of 72068140 is about 416.1479611126.

The spelling of 72068140 in words is "seventy-two million, sixty-eight thousand, one hundred forty".