28315493 has 8 divisors (see below), whose sum is σ = 29293056. Its totient is φ = 27342000.

The previous prime is 28315481. The next prime is 28315499. The reversal of 28315493 is 39451382.

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

It is not a de Polignac number, because 28315493 - 2⁸ = 28315237 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 (28315499) 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, 21080 + ... + 22382.

It is an arithmetic number, because the mean of its divisors is an integer number (3661632).

Almost surely, 2^28315493 is an apocalyptic number.

It is an amenable number.

28315493 is a deficient number, since it is larger than the sum of its proper divisors (977563).

28315493 is a wasteful number, since it uses less digits than its factorization.

28315493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035.

The product of its digits is 25920, while the sum is 35.

The square root of 28315493 is about 5321.2304028298. The cubic root of 28315493 is about 304.7951432749.

The spelling of 28315493 in words is "twenty-eight million, three hundred fifteen thousand, four hundred ninety-three".