28638141 has 16 divisors (see below), whose sum is σ = 45047808. Its totient is φ = 15836400.

The previous prime is 28638139. The next prime is 28638157. The reversal of 28638141 is 14183682.

It is not a de Polignac number, because 28638141 - 2¹ = 28638139 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28638191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21345 + ... + 22646.

It is an arithmetic number, because the mean of its divisors is an integer number (2815488).

Almost surely, 2^28638141 is an apocalyptic number.

28638141 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28638141 is a deficient number, since it is larger than the sum of its proper divisors (16409667).

28638141 is a wasteful number, since it uses less digits than its factorization.

28638141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44032.

The product of its digits is 9216, while the sum is 33.

The square root of 28638141 is about 5351.4615760556. The cubic root of 28638141 is about 305.9484619939.

The spelling of 28638141 in words is "twenty-eight million, six hundred thirty-eight thousand, one hundred forty-one".