28380375 has 40 divisors (see below), whose sum is σ = 52928304. Its totient is φ = 15130800.

The previous prime is 28380353. The next prime is 28380377. The reversal of 28380375 is 57308382.

28380375 is a `hidden beast` number, since 283 + 8 + 0 + 375 = 666.

It is not a de Polignac number, because 28380375 - 2⁵ = 28380343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28380377) 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 39 ways as a sum of consecutive naturals, for example, 8724 + ... + 11526.

Almost surely, 2^28380375 is an apocalyptic number.

28380375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28380375 is a deficient number, since it is larger than the sum of its proper divisors (24547929).

28380375 is an equidigital number, since it uses as much as digits as its factorization.

28380375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2830 (or 2811 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 28380375 is about 5327.3234367739. The cubic root of 28380375 is about 305.0277677845.

The spelling of 28380375 in words is "twenty-eight million, three hundred eighty thousand, three hundred seventy-five".