385478449 has 2 divisors, whose sum is σ = 385478450. Its totient is φ = 385478448.

The previous prime is 385478341. The next prime is 385478453. The reversal of 385478449 is 944874583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355699600 + 29778849 = 18860^2 + 5457^2 .

It is a cyclic number.

It is not a de Polignac number, because 385478449 - 2¹⁵ = 385445681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 385478396 and 385478405.

It is not a weakly prime, because it can be changed into another prime (385478549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192739224 + 192739225.

It is an arithmetic number, because the mean of its divisors is an integer number (192739225).

Almost surely, 2^385478449 is an apocalyptic number.

It is an amenable number.

385478449 is a deficient number, since it is larger than the sum of its proper divisors (1).

385478449 is an equidigital number, since it uses as much as digits as its factorization.

385478449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 52.

The square root of 385478449 is about 19633.6050943274. The cubic root of 385478449 is about 727.7798620162.

The spelling of 385478449 in words is "three hundred eighty-five million, four hundred seventy-eight thousand, four hundred forty-nine".