28978027 has 8 divisors (see below), whose sum is σ = 31736880. Its totient is φ = 26294880.

The previous prime is 28978003. The next prime is 28978073. The reversal of 28978027 is 72087982.

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

It is a cyclic number.

It is not a de Polignac number, because 28978027 - 2⁷ = 28977899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28978927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18124 + ... + 19657.

It is an arithmetic number, because the mean of its divisors is an integer number (3967110).

Almost surely, 2^28978027 is an apocalyptic number.

28978027 is a deficient number, since it is larger than the sum of its proper divisors (2758853).

28978027 is a wasteful number, since it uses less digits than its factorization.

28978027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37853.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 28978027 is about 5383.1242787066. The cubic root of 28978027 is about 307.1540675400.

The spelling of 28978027 in words is "twenty-eight million, nine hundred seventy-eight thousand, twenty-seven".