72880511 has 4 divisors (see below), whose sum is σ = 79506024. Its totient is φ = 66255000.

The previous prime is 72880501. The next prime is 72880529. The reversal of 72880511 is 11508827.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11508827 = 11 ⋅1046257.

It is a cyclic number.

It is not a de Polignac number, because 72880511 - 2¹⁸ = 72618367 is a prime.

It is a super-2 number, since 2×72880511² = 10623137767242242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72880501) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3312740 + ... + 3312761.

It is an arithmetic number, because the mean of its divisors is an integer number (19876506).

Almost surely, 2^72880511 is an apocalyptic number.

72880511 is a deficient number, since it is larger than the sum of its proper divisors (6625513).

72880511 is a wasteful number, since it uses less digits than its factorization.

72880511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6625512.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 72880511 is about 8537.0083167349. The cubic root of 72880511 is about 417.7057654008.

The spelling of 72880511 in words is "seventy-two million, eight hundred eighty thousand, five hundred eleven".