28173375 has 48 divisors (see below), whose sum is σ = 51592320. Its totient is φ = 14788800.

The previous prime is 28173373. The next prime is 28173407. The reversal of 28173375 is 57337182.

28173375 is a `hidden beast` number, since 281 + 7 + 3 + 375 = 666.

It is not a de Polignac number, because 28173375 - 2¹ = 28173373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28173373) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88717 + ... + 89033.

It is an arithmetic number, because the mean of its divisors is an integer number (1074840).

Almost surely, 2^28173375 is an apocalyptic number.

28173375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28173375 is a deficient number, since it is larger than the sum of its proper divisors (23418945).

28173375 is a wasteful number, since it uses less digits than its factorization.

28173375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 404 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 28173375 is about 5307.8597381619. The cubic root of 28173375 is about 304.2843563669.

The spelling of 28173375 in words is "twenty-eight million, one hundred seventy-three thousand, three hundred seventy-five".