380728349 has 2 divisors, whose sum is σ = 380728350. Its totient is φ = 380728348.

The previous prime is 380728319. The next prime is 380728351. The reversal of 380728349 is 943827083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364122724 + 16605625 = 19082^2 + 4075^2 .

It is a cyclic number.

It is not a de Polignac number, because 380728349 - 2²⁸ = 112292893 is a prime.

It is a super-3 number, since 3×380728349³ (a number of 27 digits) contains 333 as substring.

Together with 380728351, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380728319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190364174 + 190364175.

It is an arithmetic number, because the mean of its divisors is an integer number (190364175).

Almost surely, 2^380728349 is an apocalyptic number.

It is an amenable number.

380728349 is a deficient number, since it is larger than the sum of its proper divisors (1).

380728349 is an equidigital number, since it uses as much as digits as its factorization.

380728349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 380728349 is about 19512.2615039877. The cubic root of 380728349 is about 724.7781161667.

The spelling of 380728349 in words is "three hundred eighty million, seven hundred twenty-eight thousand, three hundred forty-nine".