28179801 has 12 divisors (see below), whose sum is σ = 43835428. Its totient is φ = 17341344.

The previous prime is 28179779. The next prime is 28179821. The reversal of 28179801 is 10897182.

It can be written as a sum of positive squares in 2 ways, for example, as 2322576 + 25857225 = 1524^2 + 5085^2 .

It is not a de Polignac number, because 28179801 - 2⁵ = 28179769 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28179821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120310 + ... + 120543.

Almost surely, 2^28179801 is an apocalyptic number.

It is an amenable number.

28179801 is a deficient number, since it is larger than the sum of its proper divisors (15655627).

28179801 is a wasteful number, since it uses less digits than its factorization.

28179801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240872 (or 240869 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 28179801 is about 5308.4650323799. The cubic root of 28179801 is about 304.3074891135.

The spelling of 28179801 in words is "twenty-eight million, one hundred seventy-nine thousand, eight hundred one".