28913323 has 8 divisors (see below), whose sum is σ = 30907296. Its totient is φ = 26980800.

The previous prime is 28913309. The next prime is 28913327. The reversal of 28913323 is 32331982.

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 28913323 - 2⁹ = 28912811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28913327) 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, 14388 + ... + 16273.

It is an arithmetic number, because the mean of its divisors is an integer number (3863412).

Almost surely, 2^28913323 is an apocalyptic number.

28913323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28913323 is a deficient number, since it is larger than the sum of its proper divisors (1993973).

28913323 is a wasteful number, since it uses less digits than its factorization.

28913323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30725.

The product of its digits is 7776, while the sum is 31.

The square root of 28913323 is about 5377.1110273083. Note that the first 3 decimals coincide. The cubic root of 28913323 is about 306.9252860658.

The spelling of 28913323 in words is "twenty-eight million, nine hundred thirteen thousand, three hundred twenty-three".