28585887446 has 4 divisors (see below), whose sum is σ = 42878831172. Its totient is φ = 14292943722.

The previous prime is 28585887359. The next prime is 28585887503. The reversal of 28585887446 is 64478858582.

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

It is a super-2 number, since 2×28585887446² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7146471860 + ... + 7146471863.

It is an arithmetic number, because the mean of its divisors is an integer number (10719707793).

Almost surely, 2^28585887446 is an apocalyptic number.

28585887446 is a deficient number, since it is larger than the sum of its proper divisors (14292943726).

28585887446 is a wasteful number, since it uses less digits than its factorization.

28585887446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14292943725.

The product of its digits is 137625600, while the sum is 65.

The spelling of 28585887446 in words is "twenty-eight billion, five hundred eighty-five million, eight hundred eighty-seven thousand, four hundred forty-six".