385662820 has 48 divisors (see below), whose sum is σ = 823152960. Its totient is φ = 151756416.

The previous prime is 385662811. The next prime is 385662853. The reversal of 385662820 is 28266583.

It is a super-3 number, since 3×385662820³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

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, 628834 + ... + 629446.

It is an arithmetic number, because the mean of its divisors is an integer number (17149020).

Almost surely, 2^385662820 is an apocalyptic number.

It is an amenable number.

385662820 is an abundant number, since it is smaller than the sum of its proper divisors (437490140).

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

385662820 is a wasteful number, since it uses less digits than its factorization.

385662820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 385662820 is about 19638.2998245775. The cubic root of 385662820 is about 727.8958737884.

The spelling of 385662820 in words is "three hundred eighty-five million, six hundred sixty-two thousand, eight hundred twenty".