28578894 has 8 divisors (see below), whose sum is σ = 57157800. Its totient is φ = 9526296.

The previous prime is 28578881. The next prime is 28578899. The reversal of 28578894 is 49887582.

It is a happy number.

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

28578894 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28578899) 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 3 ways as a sum of consecutive naturals, for example, 2381569 + ... + 2381580.

It is an arithmetic number, because the mean of its divisors is an integer number (7144725).

Almost surely, 2^28578894 is an apocalyptic number.

28578894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28578894 is a wasteful number, since it uses less digits than its factorization.

28578894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4763154.

The product of its digits is 1290240, while the sum is 51.

The square root of 28578894 is about 5345.9231195370. The cubic root of 28578894 is about 305.7373327978.

The spelling of 28578894 in words is "twenty-eight million, five hundred seventy-eight thousand, eight hundred ninety-four".