28541638 has 8 divisors (see below), whose sum is σ = 44193600. Its totient is φ = 13810440.

The previous prime is 28541627. The next prime is 28541647. The reversal of 28541638 is 83614582.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 28541597 and 28541606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230113 + ... + 230236.

It is an arithmetic number, because the mean of its divisors is an integer number (5524200).

Almost surely, 2^28541638 is an apocalyptic number.

28541638 is a deficient number, since it is larger than the sum of its proper divisors (15651962).

28541638 is a wasteful number, since it uses less digits than its factorization.

28541638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460382.

The product of its digits is 46080, while the sum is 37.

The square root of 28541638 is about 5342.4374586887. The cubic root of 28541638 is about 305.6044199881.

The spelling of 28541638 in words is "twenty-eight million, five hundred forty-one thousand, six hundred thirty-eight".