28030907 has 4 divisors (see below), whose sum is σ = 28997520. Its totient is φ = 27064296.

The previous prime is 28030889. The next prime is 28030957. The reversal of 28030907 is 70903082.

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 28030907 - 2¹⁴ = 28014523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 966583 = 28030907 / (2 + 8 + 0 + 3 + 0 + 9 + 0 + 7).

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 28030907.

It is not an unprimeable number, because it can be changed into a prime (28030957) 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, 483263 + ... + 483320.

It is an arithmetic number, because the mean of its divisors is an integer number (7249380).

Almost surely, 2^28030907 is an apocalyptic number.

28030907 is a deficient number, since it is larger than the sum of its proper divisors (966613).

28030907 is an equidigital number, since it uses as much as digits as its factorization.

28030907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966612.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 28030907 is about 5294.4222536553. The cubic root of 28030907 is about 303.7705845026.

Adding to 28030907 its reverse (70903082), we get a palindrome (98933989).

The spelling of 28030907 in words is "twenty-eight million, thirty thousand, nine hundred seven".