385530 has 32 divisors (see below), whose sum is σ = 943488. Its totient is φ = 100800.

The previous prime is 385519. The next prime is 385531. The reversal of 385530 is 35583.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 385530.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385531) by changing a digit.

385530 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2040 + ... + 2220.

It is an arithmetic number, because the mean of its divisors is an integer number (29484).

2³⁸⁵⁵³⁰ is an apocalyptic number.

385530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 385530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (471744).

385530 is an abundant number, since it is smaller than the sum of its proper divisors (557958).

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

385530 is a wasteful number, since it uses less digits than its factorization.

385530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 385530 is about 620.9106215874. The cubic root of 385530 is about 72.7812303179.

The spelling of 385530 in words is "three hundred eighty-five thousand, five hundred thirty".