28450507 has 8 divisors (see below), whose sum is σ = 29016000. Its totient is φ = 27890304.

The previous prime is 28450493. The next prime is 28450511. The reversal of 28450507 is 70505482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28450507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28450547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10563 + ... + 12979.

It is an arithmetic number, because the mean of its divisors is an integer number (3627000).

Almost surely, 2^28450507 is an apocalyptic number.

28450507 is a deficient number, since it is larger than the sum of its proper divisors (565493).

28450507 is a wasteful number, since it uses less digits than its factorization.

28450507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 28450507 is about 5333.9016676351. The cubic root of 28450507 is about 305.2788169747.

Adding to 28450507 its reverse (70505482), we get a palindrome (98955989).

The spelling of 28450507 in words is "twenty-eight million, four hundred fifty thousand, five hundred seven".