28892705 has 8 divisors (see below), whose sum is σ = 34936704. Its totient is φ = 22937200.

The previous prime is 28892681. The next prime is 28892719. The reversal of 28892705 is 50729882.

It is a happy number.

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

It is not a de Polignac number, because 28892705 - 2⁶ = 28892641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21401 + ... + 22710.

It is an arithmetic number, because the mean of its divisors is an integer number (4367088).

Almost surely, 2^28892705 is an apocalyptic number.

It is an amenable number.

28892705 is a deficient number, since it is larger than the sum of its proper divisors (6043999).

28892705 is a wasteful number, since it uses less digits than its factorization.

28892705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44247.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 28892705 is about 5375.1934848896. The cubic root of 28892705 is about 306.8523128976.

The spelling of 28892705 in words is "twenty-eight million, eight hundred ninety-two thousand, seven hundred five".