28858390 has 16 divisors (see below), whose sum is σ = 56667600. Its totient is φ = 10493920.

The previous prime is 28858387. The next prime is 28858411. The reversal of 28858390 is 9385882.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131065 + ... + 131284.

It is an arithmetic number, because the mean of its divisors is an integer number (3541725).

Almost surely, 2^28858390 is an apocalyptic number.

28858390 is a deficient number, since it is larger than the sum of its proper divisors (27809210).

28858390 is a wasteful number, since it uses less digits than its factorization.

28858390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262367.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 28858390 is about 5372.0005584512. Note that the first 3 decimals coincide. The cubic root of 28858390 is about 306.7307850073.

The spelling of 28858390 in words is "twenty-eight million, eight hundred fifty-eight thousand, three hundred ninety".