385331688 has 160 divisors (see below), whose sum is σ = 1250366400. Its totient is φ = 109946592.

The previous prime is 385331657. The next prime is 385331747. The reversal of 385331688 is 886133583.

385331688 is a `hidden beast` number, since 38 + 533 + 1 + 6 + 88 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 518245 + ... + 518987.

It is an arithmetic number, because the mean of its divisors is an integer number (7814790).

Almost surely, 2^385331688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 385331688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (625183200).

385331688 is an abundant number, since it is smaller than the sum of its proper divisors (865034712).

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

385331688 is an equidigital number, since it uses as much as digits as its factorization.

385331688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 755 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 385331688 is about 19629.8672435654. The cubic root of 385331688 is about 727.6874891408.

The spelling of 385331688 in words is "three hundred eighty-five million, three hundred thirty-one thousand, six hundred eighty-eight".