28258384 has 40 divisors (see below), whose sum is σ = 68263488. Its totient is φ = 11009280.

The previous prime is 28258367. The next prime is 28258387. The reversal of 28258384 is 48385282.

It is a super-3 number, since 3×28258384³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28258387) by changing a digit.

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, 10237 + ... + 12700.

Almost surely, 2^28258384 is an apocalyptic number.

It is an amenable number.

28258384 is an abundant number, since it is smaller than the sum of its proper divisors (40005104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28258384 is a wasteful number, since it uses less digits than its factorization.

28258384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22963 (or 22957 counting only the distinct ones).

The product of its digits is 122880, while the sum is 40.

The square root of 28258384 is about 5315.8615482347. The cubic root of 28258384 is about 304.5900934425.

The spelling of 28258384 in words is "twenty-eight million, two hundred fifty-eight thousand, three hundred eighty-four".