28480323 has 4 divisors (see below), whose sum is σ = 37973768. Its totient is φ = 18986880.

The previous prime is 28480313. The next prime is 28480327. The reversal of 28480323 is 32308482.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28480323 - 2¹³ = 28472131 is a prime.

It is a super-2 number, since 2×28480323² = 1622257596368658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28480327) 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, 4746718 + ... + 4746723.

It is an arithmetic number, because the mean of its divisors is an integer number (9493442).

Almost surely, 2^28480323 is an apocalyptic number.

28480323 is a deficient number, since it is larger than the sum of its proper divisors (9493445).

28480323 is an equidigital number, since it uses as much as digits as its factorization.

28480323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9493444.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 28480323 is about 5336.6958879067. The cubic root of 28480323 is about 305.3854233394.

The spelling of 28480323 in words is "twenty-eight million, four hundred eighty thousand, three hundred twenty-three".