72160840 has 32 divisors (see below), whose sum is σ = 162751680. Its totient is φ = 28795072.

The previous prime is 72160831. The next prime is 72160853. The reversal of 72160840 is 4806127.

It is a junction number, because it is equal to n+sod(n) for n = 72160799 and 72160808.

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, 16749 + ... + 20611.

It is an arithmetic number, because the mean of its divisors is an integer number (5085990).

Almost surely, 2^72160840 is an apocalyptic number.

It is an amenable number.

72160840 is an abundant number, since it is smaller than the sum of its proper divisors (90590840).

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

72160840 is a wasteful number, since it uses less digits than its factorization.

72160840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4341 (or 4337 counting only the distinct ones).

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

The square root of 72160840 is about 8494.7536750632. The cubic root of 72160840 is about 416.3263126354.

Adding to 72160840 its reverse (4806127), we get a palindrome (76966967).

The spelling of 72160840 in words is "seventy-two million, one hundred sixty thousand, eight hundred forty".