72280140 has 24 divisors (see below), whose sum is σ = 202384560. Its totient is φ = 19274688.

The previous prime is 72280081. The next prime is 72280157. The reversal of 72280140 is 4108227.

It is a self number, because there is not a number n which added to its sum of digits gives 72280140.

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, 602275 + ... + 602394.

It is an arithmetic number, because the mean of its divisors is an integer number (8432690).

Almost surely, 2^72280140 is an apocalyptic number.

It is an amenable number.

72280140 is an abundant number, since it is smaller than the sum of its proper divisors (130104420).

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

72280140 is a wasteful number, since it uses less digits than its factorization.

72280140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204681 (or 1204679 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 72280140 is about 8501.7727563138. The cubic root of 72280140 is about 416.5556169835. Note that the first 3 decimals are identical.

Adding to 72280140 its reverse (4108227), we get a palindrome (76388367).

The spelling of 72280140 in words is "seventy-two million, two hundred eighty thousand, one hundred forty".