28866038 has 4 divisors (see below), whose sum is σ = 43299060. Its totient is φ = 14433018.

The previous prime is 28866011. The next prime is 28866043. The reversal of 28866038 is 83066882.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 28865986 and 28866004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7216508 + ... + 7216511.

It is an arithmetic number, because the mean of its divisors is an integer number (10824765).

Almost surely, 2^28866038 is an apocalyptic number.

28866038 is a deficient number, since it is larger than the sum of its proper divisors (14433022).

28866038 is a wasteful number, since it uses less digits than its factorization.

28866038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14433021.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 28866038 is about 5372.7123503869. The cubic root of 28866038 is about 306.7578790325.

The spelling of 28866038 in words is "twenty-eight million, eight hundred sixty-six thousand, thirty-eight".