385381220 has 24 divisors (see below), whose sum is σ = 924915264. Its totient is φ = 132130656.

The previous prime is 385381207. The next prime is 385381229. The reversal of 385381220 is 22183583.

It is not an unprimeable number, because it can be changed into a prime (385381229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1376222 + ... + 1376501.

It is an arithmetic number, because the mean of its divisors is an integer number (38538136).

Almost surely, 2^385381220 is an apocalyptic number.

It is an amenable number.

385381220 is an abundant number, since it is smaller than the sum of its proper divisors (539534044).

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

385381220 is a wasteful number, since it uses less digits than its factorization.

385381220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752739 (or 2752737 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 385381220 is about 19631.1288519025. The cubic root of 385381220 is about 727.7186677103.

The spelling of 385381220 in words is "three hundred eighty-five million, three hundred eighty-one thousand, two hundred twenty".