28323815 has 8 divisors (see below), whose sum is σ = 36603168. Its totient is φ = 20916000.

The previous prime is 28323811. The next prime is 28323821. The reversal of 28323815 is 51832382.

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

It is not a de Polignac number, because 28323815 - 2² = 28323811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28323811) 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, 217811 + ... + 217940.

It is an arithmetic number, because the mean of its divisors is an integer number (4575396).

Almost surely, 2^28323815 is an apocalyptic number.

28323815 is a deficient number, since it is larger than the sum of its proper divisors (8279353).

28323815 is a wasteful number, since it uses less digits than its factorization.

28323815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435769.

The product of its digits is 11520, while the sum is 32.

The square root of 28323815 is about 5322.0123073890. The cubic root of 28323815 is about 304.8250003892.

The spelling of 28323815 in words is "twenty-eight million, three hundred twenty-three thousand, eight hundred fifteen".