28175401 has 4 divisors (see below), whose sum is σ = 28255572. Its totient is φ = 28095232.

The previous prime is 28175393. The next prime is 28175417. The reversal of 28175401 is 10457182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5517801 + 22657600 = 2349^2 + 4760^2 .

It is a cyclic number.

It is not a de Polignac number, because 28175401 - 2³ = 28175393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28175401.

It is not an unprimeable number, because it can be changed into a prime (28175101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39556 + ... + 40261.

It is an arithmetic number, because the mean of its divisors is an integer number (7063893).

Almost surely, 2^28175401 is an apocalyptic number.

It is an amenable number.

28175401 is a deficient number, since it is larger than the sum of its proper divisors (80171).

28175401 is an equidigital number, since it uses as much as digits as its factorization.

28175401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80170.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 28175401 is about 5308.0505837831. The cubic root of 28175401 is about 304.2916500775.

The spelling of 28175401 in words is "twenty-eight million, one hundred seventy-five thousand, four hundred one".