28038886 has 8 divisors (see below), whose sum is σ = 43887024. Its totient is φ = 13409880.

The previous prime is 28038883. The next prime is 28038887. The reversal of 28038886 is 68883082.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28038883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304725 + ... + 304816.

It is an arithmetic number, because the mean of its divisors is an integer number (5485878).

Almost surely, 2^28038886 is an apocalyptic number.

28038886 is a deficient number, since it is larger than the sum of its proper divisors (15848138).

28038886 is a wasteful number, since it uses less digits than its factorization.

28038886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609566.

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 28038886 is about 5295.1757289065. The cubic root of 28038886 is about 303.7994045422.

The spelling of 28038886 in words is "twenty-eight million, thirty-eight thousand, eight hundred eighty-six".