28580407 has 4 divisors (see below), whose sum is σ = 28593576. Its totient is φ = 28567240.

The previous prime is 28580359. The next prime is 28580413. The reversal of 28580407 is 70408582.

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 28580407 - 2¹⁵ = 28547639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28580507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2473 + ... + 7954.

It is an arithmetic number, because the mean of its divisors is an integer number (7148394).

Almost surely, 2^28580407 is an apocalyptic number.

28580407 is a deficient number, since it is larger than the sum of its proper divisors (13169).

28580407 is a wasteful number, since it uses less digits than its factorization.

28580407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13168.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 28580407 is about 5346.0646273684. The cubic root of 28580407 is about 305.7427280664.

Adding to 28580407 its reverse (70408582), we get a palindrome (98988989).

The spelling of 28580407 in words is "twenty-eight million, five hundred eighty thousand, four hundred seven".