28323493 has 8 divisors (see below), whose sum is σ = 30947616. Its totient is φ = 25707600.

The previous prime is 28323487. The next prime is 28323499. The reversal of 28323493 is 39432382.

It is an interprime number because it is at equal distance from previous prime (28323487) and next prime (28323499).

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 28323493 - 2⁹ = 28322981 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 (28323499) 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, 6838 + ... + 10168.

It is an arithmetic number, because the mean of its divisors is an integer number (3868452).

Almost surely, 2^28323493 is an apocalyptic number.

It is an amenable number.

28323493 is a deficient number, since it is larger than the sum of its proper divisors (2624123).

28323493 is a wasteful number, since it uses less digits than its factorization.

28323493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4115.

The product of its digits is 31104, while the sum is 34.

The square root of 28323493 is about 5321.9820555879. The cubic root of 28323493 is about 304.8238452479.

Subtracting 28323493 from its reverse (39432382), we obtain a square (11108889 = 3333²).

The spelling of 28323493 in words is "twenty-eight million, three hundred twenty-three thousand, four hundred ninety-three".