28944371 has 2 divisors, whose sum is σ = 28944372. Its totient is φ = 28944370.

The previous prime is 28944367. The next prime is 28944437. The reversal of 28944371 is 17344982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28944371 - 2² = 28944367 is a prime.

It is a super-2 number, since 2×28944371² = 1675553225171282, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28944361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14472185 + 14472186.

It is an arithmetic number, because the mean of its divisors is an integer number (14472186).

Almost surely, 2^28944371 is an apocalyptic number.

28944371 is a deficient number, since it is larger than the sum of its proper divisors (1).

28944371 is an equidigital number, since it uses as much as digits as its factorization.

28944371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 28944371 is about 5379.9973048320. The cubic root of 28944371 is about 307.0351086474.

The spelling of 28944371 in words is "twenty-eight million, nine hundred forty-four thousand, three hundred seventy-one".