28998375 has 32 divisors (see below), whose sum is σ = 55151616. Its totient is φ = 13255200.

The previous prime is 28998373. The next prime is 28998397. The reversal of 28998375 is 57389982.

It is not a de Polignac number, because 28998375 - 2¹ = 28998373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28998373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2899 + ... + 8148.

It is an arithmetic number, because the mean of its divisors is an integer number (1723488).

Almost surely, 2^28998375 is an apocalyptic number.

28998375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28998375 is a deficient number, since it is larger than the sum of its proper divisors (26153241).

28998375 is a wasteful number, since it uses less digits than its factorization.

28998375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11072 (or 11062 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The square root of 28998375 is about 5385.0139275586. The cubic root of 28998375 is about 307.2259439386.

The spelling of 28998375 in words is "twenty-eight million, nine hundred ninety-eight thousand, three hundred seventy-five".