72808775 has 12 divisors (see below), whose sum is σ = 97228152. Its totient is φ = 53766240.

The previous prime is 72808753. The next prime is 72808829. The reversal of 72808775 is 57780827.

It is not a de Polignac number, because 72808775 - 2¹⁰ = 72807751 is a prime.

It is a super-2 number, since 2×72808775² = 10602235434001250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111689 + ... + 112338.

It is an arithmetic number, because the mean of its divisors is an integer number (8102346).

Almost surely, 2^72808775 is an apocalyptic number.

72808775 is a deficient number, since it is larger than the sum of its proper divisors (24419377).

72808775 is a wasteful number, since it uses less digits than its factorization.

72808775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224050 (or 224045 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 72808775 is about 8532.8058105174. The cubic root of 72808775 is about 417.5686716973.

The spelling of 72808775 in words is "seventy-two million, eight hundred eight thousand, seven hundred seventy-five".