72216370 has 16 divisors (see below), whose sum is σ = 130984128. Its totient is φ = 28665520.

The previous prime is 72216367. The next prime is 72216371. The reversal of 72216370 is 7361227.

It is not an unprimeable number, because it can be changed into a prime (72216371) 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, 26254 + ... + 28873.

It is an arithmetic number, because the mean of its divisors is an integer number (8186508).

Almost surely, 2^72216370 is an apocalyptic number.

72216370 is a deficient number, since it is larger than the sum of its proper divisors (58767758).

72216370 is a wasteful number, since it uses less digits than its factorization.

72216370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55265.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 72216370 is about 8498.0215344514. The cubic root of 72216370 is about 416.4330772486.

Adding to 72216370 its reverse (7361227), we get a palindrome (79577597).

The spelling of 72216370 in words is "seventy-two million, two hundred sixteen thousand, three hundred seventy".