28501323 has 4 divisors (see below), whose sum is σ = 38001768. Its totient is φ = 19000880.

The previous prime is 28501241. The next prime is 28501327. The reversal of 28501323 is 32310582.

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 28501323 - 2¹⁰ = 28500299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28501293 and 28501302.

It is not an unprimeable number, because it can be changed into a prime (28501327) 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, 4750218 + ... + 4750223.

It is an arithmetic number, because the mean of its divisors is an integer number (9500442).

Almost surely, 2^28501323 is an apocalyptic number.

28501323 is a deficient number, since it is larger than the sum of its proper divisors (9500445).

28501323 is an equidigital number, since it uses as much as digits as its factorization.

28501323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9500444.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 28501323 is about 5338.6630348805. The cubic root of 28501323 is about 305.4604636670.

The spelling of 28501323 in words is "twenty-eight million, five hundred one thousand, three hundred twenty-three".