28438075 has 12 divisors (see below), whose sum is σ = 35428288. Its totient is φ = 22644000.

The previous prime is 28438063. The next prime is 28438103. The reversal of 28438075 is 57083482.

It is not a de Polignac number, because 28438075 - 2¹⁷ = 28307003 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3025 + ... + 8125.

Almost surely, 2^28438075 is an apocalyptic number.

28438075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28438075 is a deficient number, since it is larger than the sum of its proper divisors (6990213).

28438075 is a wasteful number, since it uses less digits than its factorization.

28438075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5334 (or 5329 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 28438075 is about 5332.7361644844. The cubic root of 28438075 is about 305.2343446661.

The spelling of 28438075 in words is "twenty-eight million, four hundred thirty-eight thousand, seventy-five".