28896438 has 8 divisors (see below), whose sum is σ = 57792888. Its totient is φ = 9632144.

The previous prime is 28896421. The next prime is 28896443. The reversal of 28896438 is 83469882.

It is a happy number.

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

28896438 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2408031 + ... + 2408042.

It is an arithmetic number, because the mean of its divisors is an integer number (7224111).

Almost surely, 2^28896438 is an apocalyptic number.

28896438 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.

28896438 is a wasteful number, since it uses less digits than its factorization.

28896438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4816078.

The product of its digits is 663552, while the sum is 48.

The square root of 28896438 is about 5375.5407169884. The cubic root of 28896438 is about 306.8655276560.

The spelling of 28896438 in words is "twenty-eight million, eight hundred ninety-six thousand, four hundred thirty-eight".