28766613 has 16 divisors (see below), whose sum is σ = 39504960. Its totient is φ = 18609024.

The previous prime is 28766587. The next prime is 28766623. The reversal of 28766613 is 31666782.

It is not a de Polignac number, because 28766613 - 2¹⁰ = 28765589 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28766623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21673 + ... + 22961.

It is an arithmetic number, because the mean of its divisors is an integer number (2469060).

Almost surely, 2^28766613 is an apocalyptic number.

It is an amenable number.

28766613 is a deficient number, since it is larger than the sum of its proper divisors (10738347).

28766613 is a wasteful number, since it uses less digits than its factorization.

28766613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508.

The product of its digits is 72576, while the sum is 39.

The square root of 28766613 is about 5363.4515938899. The cubic root of 28766613 is about 306.4052791336.

The spelling of 28766613 in words is "twenty-eight million, seven hundred sixty-six thousand, six hundred thirteen".