28038371 has 2 divisors, whose sum is σ = 28038372. Its totient is φ = 28038370.

The previous prime is 28038349. The next prime is 28038377. The reversal of 28038371 is 17383082.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28038371 is a prime.

It is a Sophie Germain prime.

It is equal to p_1743728 and since 28038371 and 1743728 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28038377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14019185 + 14019186.

It is an arithmetic number, because the mean of its divisors is an integer number (14019186).

Almost surely, 2^28038371 is an apocalyptic number.

28038371 is a deficient number, since it is larger than the sum of its proper divisors (1).

28038371 is an equidigital number, since it uses as much as digits as its factorization.

28038371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 28038371 is about 5295.1270995133. The cubic root of 28038371 is about 303.7975445343.

The spelling of 28038371 in words is "twenty-eight million, thirty-eight thousand, three hundred seventy-one".