28578371 has 2 divisors, whose sum is σ = 28578372. Its totient is φ = 28578370.

The previous prime is 28578313. The next prime is 28578391. The reversal of 28578371 is 17387582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28578371 - 2¹⁴ = 28561987 is a prime.

It is not a weakly prime, because it can be changed into another prime (28578391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14289185 + 14289186.

It is an arithmetic number, because the mean of its divisors is an integer number (14289186).

Almost surely, 2^28578371 is an apocalyptic number.

28578371 is a deficient number, since it is larger than the sum of its proper divisors (1).

28578371 is an equidigital number, since it uses as much as digits as its factorization.

28578371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 41.

The square root of 28578371 is about 5345.8742035330. The cubic root of 28578371 is about 305.7354677665.

The spelling of 28578371 in words is "twenty-eight million, five hundred seventy-eight thousand, three hundred seventy-one".