28556371 has 2 divisors, whose sum is σ = 28556372. Its totient is φ = 28556370.

The previous prime is 28556321. The next prime is 28556383. The reversal of 28556371 is 17365582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28556371 - 2²¹ = 26459219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28556371.

It is not a weakly prime, because it can be changed into another prime (28556321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14278185 + 14278186.

It is an arithmetic number, because the mean of its divisors is an integer number (14278186).

Almost surely, 2^28556371 is an apocalyptic number.

28556371 is a deficient number, since it is larger than the sum of its proper divisors (1).

28556371 is an equidigital number, since it uses as much as digits as its factorization.

28556371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 28556371 is about 5343.8161457894. The cubic root of 28556371 is about 305.6569945860.

The spelling of 28556371 in words is "twenty-eight million, five hundred fifty-six thousand, three hundred seventy-one".