28804742 has 8 divisors (see below), whose sum is σ = 43267800. Its totient is φ = 14382144.

The previous prime is 28804739. The next prime is 28804751. The reversal of 28804742 is 24740882.

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

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 8267 + ... + 11222.

It is an arithmetic number, because the mean of its divisors is an integer number (5408475).

Almost surely, 2^28804742 is an apocalyptic number.

28804742 is a deficient number, since it is larger than the sum of its proper divisors (14463058).

28804742 is a wasteful number, since it uses less digits than its factorization.

28804742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20230.

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 28804742 is about 5367.0049375792. The cubic root of 28804742 is about 306.5405953644.

The spelling of 28804742 in words is "twenty-eight million, eight hundred four thousand, seven hundred forty-two".