72750222 has 24 divisors (see below), whose sum is σ = 158034240. Its totient is φ = 24187200.

The previous prime is 72750203. The next prime is 72750269. The reversal of 72750222 is 22205727.

It is a happy number.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2179 + ... + 12257.

It is an arithmetic number, because the mean of its divisors is an integer number (6584760).

Almost surely, 2^72750222 is an apocalyptic number.

72750222 is an abundant number, since it is smaller than the sum of its proper divisors (85284018).

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

72750222 is a wasteful number, since it uses less digits than its factorization.

72750222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10488 (or 10485 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 72750222 is about 8529.3740684765. The cubic root of 72750222 is about 417.4567050853.

Adding to 72750222 its reverse (22205727), we get a palindrome (94955949).

The spelling of 72750222 in words is "seventy-two million, seven hundred fifty thousand, two hundred twenty-two".