385722820 has 24 divisors (see below), whose sum is σ = 925735104. Its totient is φ = 132247776.

The previous prime is 385722803. The next prime is 385722833. The reversal of 385722820 is 28227583.

It is a super-4 number, since 4×385722820⁴ (a number of 35 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 385722820.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1377442 + ... + 1377721.

It is an arithmetic number, because the mean of its divisors is an integer number (38572296).

Almost surely, 2^385722820 is an apocalyptic number.

It is an amenable number.

385722820 is an abundant number, since it is smaller than the sum of its proper divisors (540012284).

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

385722820 is a wasteful number, since it uses less digits than its factorization.

385722820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755179 (or 2755177 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 385722820 is about 19639.8273923169. The cubic root of 385722820 is about 727.9336196167.

The spelling of 385722820 in words is "three hundred eighty-five million, seven hundred twenty-two thousand, eight hundred twenty".