28804738 has 8 divisors (see below), whose sum is σ = 43336332. Its totient is φ = 14359296.

The previous prime is 28804709. The next prime is 28804739. The reversal of 28804738 is 83740882.

It can be written as a sum of positive squares in 2 ways, for example, as 28804689 + 49 = 5367^2 + 7^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 28804738.

It is not an unprimeable number, because it can be changed into a prime (28804739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20695 + ... + 22042.

Almost surely, 2^28804738 is an apocalyptic number.

28804738 is a deficient number, since it is larger than the sum of its proper divisors (14531594).

28804738 is a wasteful number, since it uses less digits than its factorization.

28804738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43076.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 28804738 is about 5367.0045649319. The cubic root of 28804738 is about 306.5405811750.

The spelling of 28804738 in words is "twenty-eight million, eight hundred four thousand, seven hundred thirty-eight".