28851401 has 4 divisors (see below), whose sum is σ = 28943892. Its totient is φ = 28758912.

The previous prime is 28851391. The next prime is 28851437. The reversal of 28851401 is 10415882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10415882 = 2 ⋅5207941.

It can be written as a sum of positive squares in 2 ways, for example, as 602176 + 28249225 = 776^2 + 5315^2 .

It is a cyclic number.

It is not a de Polignac number, because 28851401 - 2²² = 24657097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28851461) 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 3 ways as a sum of consecutive naturals, for example, 45776 + ... + 46401.

It is an arithmetic number, because the mean of its divisors is an integer number (7235973).

Almost surely, 2^28851401 is an apocalyptic number.

It is an amenable number.

28851401 is a deficient number, since it is larger than the sum of its proper divisors (92491).

28851401 is an equidigital number, since it uses as much as digits as its factorization.

28851401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92490.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 28851401 is about 5371.3500165228. The cubic root of 28851401 is about 306.7060213881.

The spelling of 28851401 in words is "twenty-eight million, eight hundred fifty-one thousand, four hundred one".