72807208 has 8 divisors (see below), whose sum is σ = 136513530. Its totient is φ = 36403600.

The previous prime is 72807191. The next prime is 72807233. The reversal of 72807208 is 80270827.

It can be written as a sum of positive squares in only one way, i.e., 45995524 + 26811684 = 6782^2 + 5178^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4550443 + ... + 4550458.

Almost surely, 2^72807208 is an apocalyptic number.

It is an amenable number.

72807208 is a deficient number, since it is larger than the sum of its proper divisors (63706322).

72807208 is a wasteful number, since it uses less digits than its factorization.

72807208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9100907 (or 9100903 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 72807208 is about 8532.7139879408. The cubic root of 72807208 is about 417.5656760200.

The spelling of 72807208 in words is "seventy-two million, eight hundred seven thousand, two hundred eight".