28859937 has 4 divisors (see below), whose sum is σ = 38479920. Its totient is φ = 19239956.

The previous prime is 28859911. The next prime is 28859939. The reversal of 28859937 is 73995882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28859937 - 2¹¹ = 28857889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28859937.

It is not an unprimeable number, because it can be changed into a prime (28859939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4809987 + ... + 4809992.

It is an arithmetic number, because the mean of its divisors is an integer number (9619980).

Almost surely, 2^28859937 is an apocalyptic number.

It is an amenable number.

28859937 is a deficient number, since it is larger than the sum of its proper divisors (9619983).

28859937 is an equidigital number, since it uses as much as digits as its factorization.

28859937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9619982.

The product of its digits is 1088640, while the sum is 51.

The square root of 28859937 is about 5372.1445438484. The cubic root of 28859937 is about 306.7362658403.

The spelling of 28859937 in words is "twenty-eight million, eight hundred fifty-nine thousand, nine hundred thirty-seven".