385478321 has 16 divisors (see below), whose sum is σ = 415426944. Its totient is φ = 356742144.

The previous prime is 385478309. The next prime is 385478339. The reversal of 385478321 is 123874583.

It is not a de Polignac number, because 385478321 - 2⁶ = 385478257 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385478341) 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 in 15 ways as a sum of consecutive naturals, for example, 163070 + ... + 165416.

It is an arithmetic number, because the mean of its divisors is an integer number (25964184).

Almost surely, 2^385478321 is an apocalyptic number.

It is an amenable number.

385478321 is a deficient number, since it is larger than the sum of its proper divisors (29948623).

385478321 is a wasteful number, since it uses less digits than its factorization.

385478321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600.

The product of its digits is 161280, while the sum is 41.

The square root of 385478321 is about 19633.6018346100. The cubic root of 385478321 is about 727.7797814619.

The spelling of 385478321 in words is "three hundred eighty-five million, four hundred seventy-eight thousand, three hundred twenty-one".