28978003 has 2 divisors, whose sum is σ = 28978004. Its totient is φ = 28978002.

The previous prime is 28977943. The next prime is 28978073. The reversal of 28978003 is 30087982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28978003 - 2⁹ = 28977491 is a prime.

It is not a weakly prime, because it can be changed into another prime (28978073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14489001 + 14489002.

It is an arithmetic number, because the mean of its divisors is an integer number (14489002).

Almost surely, 2^28978003 is an apocalyptic number.

28978003 is a deficient number, since it is larger than the sum of its proper divisors (1).

28978003 is an equidigital number, since it uses as much as digits as its factorization.

28978003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 28978003 is about 5383.1220495174. The cubic root of 28978003 is about 307.1539827436.

The spelling of 28978003 in words is "twenty-eight million, nine hundred seventy-eight thousand, three".