28430273 has 8 divisors (see below), whose sum is σ = 30161160. Its totient is φ = 26705920.

The previous prime is 28430263. The next prime is 28430291. The reversal of 28430273 is 37203482.

It can be written as a sum of positive squares in 4 ways, for example, as 13630864 + 14799409 = 3692^2 + 3847^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28430273 - 2¹⁰ = 28429249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28430263) 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, 9593 + ... + 12201.

It is an arithmetic number, because the mean of its divisors is an integer number (3770145).

Almost surely, 2^28430273 is an apocalyptic number.

It is an amenable number.

28430273 is a deficient number, since it is larger than the sum of its proper divisors (1730887).

28430273 is a wasteful number, since it uses less digits than its factorization.

28430273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3267.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 28430273 is about 5332.0045948967. The cubic root of 28430273 is about 305.2064283816.

The spelling of 28430273 in words is "twenty-eight million, four hundred thirty thousand, two hundred seventy-three".