28780298 has 16 divisors (see below), whose sum is σ = 43805184. Its totient is φ = 14180400.

The previous prime is 28780289. The next prime is 28780313. The reversal of 28780298 is 89208782.

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, 47111 + ... + 47717.

It is an arithmetic number, because the mean of its divisors is an integer number (2737824).

Almost surely, 2^28780298 is an apocalyptic number.

28780298 is a deficient number, since it is larger than the sum of its proper divisors (15024886).

28780298 is a wasteful number, since it uses less digits than its factorization.

28780298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 28780298 is about 5364.7272064850. The cubic root of 28780298 is about 306.4538596586.

The spelling of 28780298 in words is "twenty-eight million, seven hundred eighty thousand, two hundred ninety-eight".