72750220 has 24 divisors (see below), whose sum is σ = 152965008. Its totient is φ = 29064000.

The previous prime is 72750203. The next prime is 72750269. The reversal of 72750220 is 2205727.

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, 19290 + ... + 22750.

It is an arithmetic number, because the mean of its divisors is an integer number (6373542).

Almost surely, 2^72750220 is an apocalyptic number.

It is an amenable number.

72750220 is an abundant number, since it is smaller than the sum of its proper divisors (80214788).

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

72750220 is a wasteful number, since it uses less digits than its factorization.

72750220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4521 (or 4519 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 72750220 is about 8529.3739512346. The cubic root of 72750220 is about 417.4567012598.

Adding to 72750220 its reverse (2205727), we get a palindrome (74955947).

The spelling of 72750220 in words is "seventy-two million, seven hundred fifty thousand, two hundred twenty".