28887539 has 8 divisors (see below), whose sum is σ = 30874608. Its totient is φ = 26932480.

The previous prime is 28887533. The next prime is 28887541. The reversal of 28887539 is 93578882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28887539 - 2⁸ = 28887283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28887533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6122 + ... + 9759.

It is an arithmetic number, because the mean of its divisors is an integer number (3859326).

Almost surely, 2^28887539 is an apocalyptic number.

28887539 is a deficient number, since it is larger than the sum of its proper divisors (1987069).

28887539 is a wasteful number, since it uses less digits than its factorization.

28887539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16005.

The product of its digits is 967680, while the sum is 50.

The square root of 28887539 is about 5374.7129225662. The cubic root of 28887539 is about 306.8340234650.

The spelling of 28887539 in words is "twenty-eight million, eight hundred eighty-seven thousand, five hundred thirty-nine".