28584490919 has 4 divisors (see below), whose sum is σ = 29827294896. Its totient is φ = 27341686944.

The previous prime is 28584490817. The next prime is 28584490939. The reversal of 28584490919 is 91909448582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28584490919 - 2²⁴ = 28567713703 is a prime.

It is a super-2 number, since 2×28584490919² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28584490939) 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, 621401954 + ... + 621401999.

It is an arithmetic number, because the mean of its divisors is an integer number (7456823724).

Almost surely, 2^28584490919 is an apocalyptic number.

28584490919 is a deficient number, since it is larger than the sum of its proper divisors (1242803977).

28584490919 is a wasteful number, since it uses less digits than its factorization.

28584490919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242803976.

The product of its (nonzero) digits is 7464960, while the sum is 59.

The spelling of 28584490919 in words is "twenty-eight billion, five hundred eighty-four million, four hundred ninety thousand, nine hundred nineteen".