28736617 has 16 divisors (see below), whose sum is σ = 35496832. Its totient is φ = 22654080.

The previous prime is 28736581. The next prime is 28736623. The reversal of 28736617 is 71663782.

It is a cyclic number.

It is not a de Polignac number, because 28736617 - 2¹¹ = 28734569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28736617.

It is not an unprimeable number, because it can be changed into a prime (28736627) 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, 41242 + ... + 41932.

It is an arithmetic number, because the mean of its divisors is an integer number (2218552).

Almost surely, 2^28736617 is an apocalyptic number.

It is an amenable number.

28736617 is a deficient number, since it is larger than the sum of its proper divisors (6760215).

28736617 is a wasteful number, since it uses less digits than its factorization.

28736617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168.

The product of its digits is 84672, while the sum is 40.

The square root of 28736617 is about 5360.6545309318. The cubic root of 28736617 is about 306.2987420961.

The spelling of 28736617 in words is "twenty-eight million, seven hundred thirty-six thousand, six hundred seventeen".