28145371 has 2 divisors, whose sum is σ = 28145372. Its totient is φ = 28145370.

The previous prime is 28145347. The next prime is 28145389. The reversal of 28145371 is 17354182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28145371 - 2²¹ = 26048219 is a prime.

It is not a weakly prime, because it can be changed into another prime (28145321) 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, 14072685 + 14072686.

It is an arithmetic number, because the mean of its divisors is an integer number (14072686).

Almost surely, 2^28145371 is an apocalyptic number.

28145371 is a deficient number, since it is larger than the sum of its proper divisors (1).

28145371 is an equidigital number, since it uses as much as digits as its factorization.

28145371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 31.

The square root of 28145371 is about 5305.2211075506. The cubic root of 28145371 is about 304.1835045995.

The spelling of 28145371 in words is "twenty-eight million, one hundred forty-five thousand, three hundred seventy-one".