28865517 has 16 divisors (see below), whose sum is σ = 39600960. Its totient is φ = 18691200.

The previous prime is 28865479. The next prime is 28865519. The reversal of 28865517 is 71556882.

It is not a de Polignac number, because 28865517 - 2⁶ = 28865453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28865519) 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, 40359 + ... + 41067.

It is an arithmetic number, because the mean of its divisors is an integer number (2475060).

Almost surely, 2^28865517 is an apocalyptic number.

It is an amenable number.

28865517 is a deficient number, since it is larger than the sum of its proper divisors (10735443).

28865517 is a wasteful number, since it uses less digits than its factorization.

28865517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084.

The product of its digits is 134400, while the sum is 42.

The square root of 28865517 is about 5372.6638644159. The cubic root of 28865517 is about 306.7560334748.

The spelling of 28865517 in words is "twenty-eight million, eight hundred sixty-five thousand, five hundred seventeen".