28865541 has 16 divisors (see below), whose sum is σ = 42897600. Its totient is φ = 17157888.

The previous prime is 28865537. The next prime is 28865563. The reversal of 28865541 is 14556882.

It is not a de Polignac number, because 28865541 - 2² = 28865537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28865541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28865521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13926 + ... + 15863.

It is an arithmetic number, because the mean of its divisors is an integer number (2681100).

Almost surely, 2^28865541 is an apocalyptic number.

It is an amenable number.

28865541 is a deficient number, since it is larger than the sum of its proper divisors (14032059).

28865541 is a wasteful number, since it uses less digits than its factorization.

28865541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29828.

The product of its digits is 76800, while the sum is 39.

The square root of 28865541 is about 5372.6660979443. Note that the first 3 decimals coincide. The cubic root of 28865541 is about 306.7561184914.

The spelling of 28865541 in words is "twenty-eight million, eight hundred sixty-five thousand, five hundred forty-one".