28160401 has 8 divisors (see below), whose sum is σ = 28584360. Its totient is φ = 27739008.

The previous prime is 28160393. The next prime is 28160411. The reversal of 28160401 is 10406182.

It can be written as a sum of positive squares in 4 ways, for example, as 2556801 + 25603600 = 1599^2 + 5060^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28160401 - 2³ = 28160393 is a prime.

It is a super-4 number, since 4×28160401⁴ (a number of 31 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28160411) 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 7 ways as a sum of consecutive naturals, for example, 34935 + ... + 35731.

It is an arithmetic number, because the mean of its divisors is an integer number (3573045).

Almost surely, 2^28160401 is an apocalyptic number.

It is an amenable number.

28160401 is a deficient number, since it is larger than the sum of its proper divisors (423959).

28160401 is an equidigital number, since it uses as much as digits as its factorization.

28160401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 28160401 is about 5306.6374475745. The cubic root of 28160401 is about 304.2376409676.

Adding to 28160401 its reverse (10406182), we get a palindrome (38566583).

It can be divided in two parts, 28160 and 401, that added together give a 4-th power (28561 = 13⁴).

The spelling of 28160401 in words is "twenty-eight million, one hundred sixty thousand, four hundred one".