28101943 has 2 divisors, whose sum is σ = 28101944. Its totient is φ = 28101942.

The previous prime is 28101917. The next prime is 28101949. The reversal of 28101943 is 34910182.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28101943 - 2²¹ = 26004791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28101949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14050971 + 14050972.

It is an arithmetic number, because the mean of its divisors is an integer number (14050972).

Almost surely, 2^28101943 is an apocalyptic number.

28101943 is a deficient number, since it is larger than the sum of its proper divisors (1).

28101943 is an equidigital number, since it uses as much as digits as its factorization.

28101943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 28101943 is about 5301.1265783794. The cubic root of 28101943 is about 304.0269734550.

It can be divided in two parts, 2810 and 1943, that added together give a triangular number (4753 = T₉₇).

The spelling of 28101943 in words is "twenty-eight million, one hundred one thousand, nine hundred forty-three".