385516684 has 24 divisors (see below), whose sum is σ = 816389280. Its totient is φ = 155502336.

The previous prime is 385516643. The next prime is 385516687. The reversal of 385516684 is 486615583.

It is a super-2 number, since 2×385516684² = 297246227284711712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (385516687) 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, 404479 + ... + 405430.

It is an arithmetic number, because the mean of its divisors is an integer number (34016220).

Almost surely, 2^385516684 is an apocalyptic number.

385516684 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

385516684 is an abundant number, since it is smaller than the sum of its proper divisors (430872596).

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

385516684 is a wasteful number, since it uses less digits than its factorization.

385516684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809937 (or 809935 counting only the distinct ones).

The product of its digits is 691200, while the sum is 46.

The square root of 385516684 is about 19634.5787833607. The cubic root of 385516684 is about 727.8039236666.

The spelling of 385516684 in words is "three hundred eighty-five million, five hundred sixteen thousand, six hundred eighty-four".