385221648 has 80 divisors (see below), whose sum is σ = 1148466176. Its totient is φ = 108984960.

The previous prime is 385221611. The next prime is 385221671. The reversal of 385221648 is 846122583.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29043 + ... + 40173.

Almost surely, 2^385221648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 385221648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574233088).

385221648 is an abundant number, since it is smaller than the sum of its proper divisors (763244528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

385221648 is a wasteful number, since it uses less digits than its factorization.

385221648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11252 (or 11246 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 385221648 is about 19627.0641716992. The cubic root of 385221648 is about 727.6182134515.

The spelling of 385221648 in words is "three hundred eighty-five million, two hundred twenty-one thousand, six hundred forty-eight".