28430313 has 8 divisors (see below), whose sum is σ = 38622528. Its totient is φ = 18595824.

The previous prime is 28430299. The next prime is 28430329. The reversal of 28430313 is 31303482.

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

It is not a de Polignac number, because 28430313 - 2¹⁴ = 28413929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28430333) 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, 89245 + ... + 89562.

It is an arithmetic number, because the mean of its divisors is an integer number (4827816).

Almost surely, 2^28430313 is an apocalyptic number.

It is an amenable number.

28430313 is a deficient number, since it is larger than the sum of its proper divisors (10192215).

28430313 is a wasteful number, since it uses less digits than its factorization.

28430313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178863.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 28430313 is about 5332.0083458299. The cubic root of 28430313 is about 305.2065715184.

Adding to 28430313 its reverse (31303482), we get a palindrome (59733795).

The spelling of 28430313 in words is "twenty-eight million, four hundred thirty thousand, three hundred thirteen".