28458393 has 16 divisors (see below), whose sum is σ = 38716800. Its totient is φ = 18589824.

The previous prime is 28458379. The next prime is 28458401. The reversal of 28458393 is 39385482.

It is not a de Polignac number, because 28458393 - 2⁴ = 28458377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28458893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43255 + ... + 43907.

It is an arithmetic number, because the mean of its divisors is an integer number (2419800).

Almost surely, 2^28458393 is an apocalyptic number.

It is an amenable number.

28458393 is a deficient number, since it is larger than the sum of its proper divisors (10258407).

28458393 is a wasteful number, since it uses less digits than its factorization.

28458393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928.

The product of its digits is 207360, while the sum is 42.

The square root of 28458393 is about 5334.6408501416. The cubic root of 28458393 is about 305.3070204130.

The spelling of 28458393 in words is "twenty-eight million, four hundred fifty-eight thousand, three hundred ninety-three".