72880005 has 16 divisors (see below), whose sum is σ = 127209024. Its totient is φ = 35335680.

The previous prime is 72879979. The next prime is 72880057. The reversal of 72880005 is 50008827.

It is not a de Polignac number, because 72880005 - 2⁸ = 72879749 is a prime.

It is a super-2 number, since 2×72880005² = 10622990257600050, which contains 22 as substring.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 220684 + ... + 221013.

It is an arithmetic number, because the mean of its divisors is an integer number (7950564).

Almost surely, 2^72880005 is an apocalyptic number.

It is an amenable number.

72880005 is a deficient number, since it is larger than the sum of its proper divisors (54329019).

72880005 is a wasteful number, since it uses less digits than its factorization.

72880005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441716.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 72880005 is about 8536.9786810089. The cubic root of 72880005 is about 417.7047987061.

The spelling of 72880005 in words is "seventy-two million, eight hundred eighty thousand, five".