28928330 has 16 divisors (see below), whose sum is σ = 52163784. Its totient is φ = 11550720.

The previous prime is 28928327. The next prime is 28928351. The reversal of 28928330 is 3382982.

It can be written as a sum of positive squares in 4 ways, for example, as 19386409 + 9541921 = 4403^2 + 3089^2 .

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, 4154 + ... + 8666.

Almost surely, 2^28928330 is an apocalyptic number.

28928330 is a deficient number, since it is larger than the sum of its proper divisors (23235454).

28928330 is a wasteful number, since it uses less digits than its factorization.

28928330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5161.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 28928330 is about 5378.5062982207. The cubic root of 28928330 is about 306.9783784424.

The spelling of 28928330 in words is "twenty-eight million, nine hundred twenty-eight thousand, three hundred thirty".