28115738 has 16 divisors (see below), whose sum is σ = 48323520. Its totient is φ = 12018336.

The previous prime is 28115719. The next prime is 28115749. The reversal of 28115738 is 83751182.

It is a junction number, because it is equal to n+sod(n) for n = 28115698 and 28115707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3470 + ... + 8262.

It is an arithmetic number, because the mean of its divisors is an integer number (3020220).

Almost surely, 2^28115738 is an apocalyptic number.

28115738 is a deficient number, since it is larger than the sum of its proper divisors (20207782).

28115738 is a wasteful number, since it uses less digits than its factorization.

28115738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5221.

The product of its digits is 13440, while the sum is 35.

The square root of 28115738 is about 5302.4275572609. The cubic root of 28115738 is about 304.0767133847.

The spelling of 28115738 in words is "twenty-eight million, one hundred fifteen thousand, seven hundred thirty-eight".