28989375 has 20 divisors (see below), whose sum is σ = 48303288. Its totient is φ = 15460000.

The previous prime is 28989329. The next prime is 28989377. The reversal of 28989375 is 57398982.

It is not a de Polignac number, because 28989375 - 2⁹ = 28988863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28989377) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5856 + ... + 9605.

Almost surely, 2^28989375 is an apocalyptic number.

28989375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28989375 is a deficient number, since it is larger than the sum of its proper divisors (19313913).

28989375 is an equidigital number, since it uses as much as digits as its factorization.

28989375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15484 (or 15469 counting only the distinct ones).

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

The square root of 28989375 is about 5384.1782102750. The cubic root of 28989375 is about 307.1941568747.

The spelling of 28989375 in words is "twenty-eight million, nine hundred eighty-nine thousand, three hundred seventy-five".