28500338 has 8 divisors (see below), whose sum is σ = 42826332. Its totient is φ = 14224896.

The previous prime is 28500331. The next prime is 28500343. The reversal of 28500338 is 83300582.

It can be written as a sum of positive squares in 2 ways, for example, as 18809569 + 9690769 = 4337^2 + 3113^2 .

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

It is a super-2 number, since 2×28500338² = 1624538532228488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28500338.

It is not an unprimeable number, because it can be changed into a prime (28500331) by changing a digit.

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, 11195 + ... + 13502.

Almost surely, 2^28500338 is an apocalyptic number.

28500338 is a deficient number, since it is larger than the sum of its proper divisors (14325994).

28500338 is a wasteful number, since it uses less digits than its factorization.

28500338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25276.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 28500338 is about 5338.5707825222. The cubic root of 28500338 is about 305.4569447423.

The spelling of 28500338 in words is "twenty-eight million, five hundred thousand, three hundred thirty-eight".