28379587 has 4 divisors (see below), whose sum is σ = 28983456. Its totient is φ = 27775720.

The previous prime is 28379573. The next prime is 28379641. The reversal of 28379587 is 78597382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78597382 = 2 ⋅39298691.

It is a cyclic number.

It is not a de Polignac number, because 28379587 - 2⁷ = 28379459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28379587.

It is not an unprimeable number, because it can be changed into a prime (28379557) 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 3 ways as a sum of consecutive naturals, for example, 301864 + ... + 301957.

It is an arithmetic number, because the mean of its divisors is an integer number (7245864).

Almost surely, 2^28379587 is an apocalyptic number.

28379587 is a deficient number, since it is larger than the sum of its proper divisors (603869).

28379587 is an equidigital number, since it uses as much as digits as its factorization.

28379587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603868.

The product of its digits is 846720, while the sum is 49.

The square root of 28379587 is about 5327.2494779201. The cubic root of 28379587 is about 305.0249446587.

The spelling of 28379587 in words is "twenty-eight million, three hundred seventy-nine thousand, five hundred eighty-seven".