72312208 has 20 divisors (see below), whose sum is σ = 143892700. Its totient is φ = 35178624.

The previous prime is 72312187. The next prime is 72312209. The reversal of 72312208 is 80221327.

It can be written as a sum of positive squares in 2 ways, for example, as 49730704 + 22581504 = 7052^2 + 4752^2 .

It is not an unprimeable number, because it can be changed into a prime (72312209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60483 + ... + 61666.

It is an arithmetic number, because the mean of its divisors is an integer number (7194635).

Almost surely, 2^72312208 is an apocalyptic number.

It is an amenable number.

72312208 is a deficient number, since it is larger than the sum of its proper divisors (71580492).

72312208 is a wasteful number, since it uses less digits than its factorization.

72312208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122194 (or 122188 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 72312208 is about 8503.6585067840. The cubic root of 72312208 is about 416.6172112680.

The spelling of 72312208 in words is "seventy-two million, three hundred twelve thousand, two hundred eight".