28528678 has 4 divisors (see below), whose sum is σ = 42793020. Its totient is φ = 14264338.

The previous prime is 28528657. The next prime is 28528691. The reversal of 28528678 is 87682582.

It is a happy number.

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

It is a congruent number.

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 as a sum of consecutive naturals, namely, 7132168 + ... + 7132171.

It is an arithmetic number, because the mean of its divisors is an integer number (10698255).

Almost surely, 2^28528678 is an apocalyptic number.

28528678 is a deficient number, since it is larger than the sum of its proper divisors (14264342).

28528678 is a wasteful number, since it uses less digits than its factorization.

28528678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14264341.

The product of its digits is 430080, while the sum is 46.

The square root of 28528678 is about 5341.2243914668. The cubic root of 28528678 is about 305.5581573675.

The spelling of 28528678 in words is "twenty-eight million, five hundred twenty-eight thousand, six hundred seventy-eight".