28125401 has 8 divisors (see below), whose sum is σ = 29131008. Its totient is φ = 27126000.

The previous prime is 28125353. The next prime is 28125403. The reversal of 28125401 is 10452182.

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 28125401 - 2²² = 23931097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28125403) 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, 8891 + ... + 11631.

It is an arithmetic number, because the mean of its divisors is an integer number (3641376).

Almost surely, 2^28125401 is an apocalyptic number.

It is an amenable number.

28125401 is a deficient number, since it is larger than the sum of its proper divisors (1005607).

28125401 is a wasteful number, since it uses less digits than its factorization.

28125401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3103.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 28125401 is about 5303.3386654069. The cubic root of 28125401 is about 304.1115450832. Note that the first 3 decimals are identical.

Adding to 28125401 its reverse (10452182), we get a palindrome (38577583).

The spelling of 28125401 in words is "twenty-eight million, one hundred twenty-five thousand, four hundred one".