28175040 has 140 divisors (see below), whose sum is σ = 100315776. Its totient is φ = 7506432.

The previous prime is 28175011. The next prime is 28175047. The reversal of 28175040 is 4057182.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 28174995 and 28175013.

It is not an unprimeable number, because it can be changed into a prime (28175047) 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 19 ways as a sum of consecutive naturals, for example, 25377 + ... + 26463.

Almost surely, 2^28175040 is an apocalyptic number.

28175040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28175040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50157888).

28175040 is an abundant number, since it is smaller than the sum of its proper divisors (72140736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28175040 is a wasteful number, since it uses less digits than its factorization.

28175040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28175040 is about 5308.0165787232. The cubic root of 28175040 is about 304.2903504834.

The spelling of 28175040 in words is "twenty-eight million, one hundred seventy-five thousand, forty".