28049517 has 16 divisors (see below), whose sum is σ = 41863680. Its totient is φ = 18560736.

The previous prime is 28049509. The next prime is 28049537. The reversal of 28049517 is 71594082.

It is not a de Polignac number, because 28049517 - 2³ = 28049509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28049537) 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, 93 + ... + 7490.

It is an arithmetic number, because the mean of its divisors is an integer number (2616480).

Almost surely, 2^28049517 is an apocalyptic number.

28049517 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28049517 is a deficient number, since it is larger than the sum of its proper divisors (13814163).

28049517 is a wasteful number, since it uses less digits than its factorization.

28049517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7729 (or 7723 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 28049517 is about 5296.1794720345. The cubic root of 28049517 is about 303.8377950757.

It can be divided in two parts, 2804 and 9517, that added together give a palindrome (12321).

The spelling of 28049517 in words is "twenty-eight million, forty-nine thousand, five hundred seventeen".