28638158 has 16 divisors (see below), whose sum is σ = 43925760. Its totient is φ = 13999200.

The previous prime is 28638157. The next prime is 28638173. The reversal of 28638158 is 85183682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28638157) 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 7 ways as a sum of consecutive naturals, for example, 22688 + ... + 23916.

It is an arithmetic number, because the mean of its divisors is an integer number (2745360).

Almost surely, 2^28638158 is an apocalyptic number.

28638158 is a deficient number, since it is larger than the sum of its proper divisors (15287602).

28638158 is a wasteful number, since it uses less digits than its factorization.

28638158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483.

The product of its digits is 92160, while the sum is 41.

The square root of 28638158 is about 5351.4631644065. The cubic root of 28638158 is about 305.9485225323.

The spelling of 28638158 in words is "twenty-eight million, six hundred thirty-eight thousand, one hundred fifty-eight".