28978343 has 2 divisors, whose sum is σ = 28978344. Its totient is φ = 28978342.

The previous prime is 28978307. The next prime is 28978357. The reversal of 28978343 is 34387982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28978343 - 2¹² = 28974247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28978294 and 28978303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28978373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14489171 + 14489172.

It is an arithmetic number, because the mean of its divisors is an integer number (14489172).

Almost surely, 2^28978343 is an apocalyptic number.

28978343 is a deficient number, since it is larger than the sum of its proper divisors (1).

28978343 is an equidigital number, since it uses as much as digits as its factorization.

28978343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 44.

The square root of 28978343 is about 5383.1536296115. The cubic root of 28978343 is about 307.1551840220.

The spelling of 28978343 in words is "twenty-eight million, nine hundred seventy-eight thousand, three hundred forty-three".