385961985 has 24 divisors (see below), whose sum is σ = 687084840. Its totient is φ = 200282112.

The previous prime is 385961981. The next prime is 385961993. The reversal of 385961985 is 589169583.

It is a happy number.

385961985 is a `hidden beast` number, since 38 + 596 + 19 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 176783616 + 209178369 = 13296^2 + 14463^2 .

It is not a de Polignac number, because 385961985 - 2² = 385961981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (385961981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114240 + ... + 117569.

It is an arithmetic number, because the mean of its divisors is an integer number (28628535).

Almost surely, 2^385961985 is an apocalyptic number.

It is an amenable number.

385961985 is a deficient number, since it is larger than the sum of its proper divisors (301122855).

385961985 is a wasteful number, since it uses less digits than its factorization.

385961985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231857 (or 231854 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The square root of 385961985 is about 19645.9152242903. The cubic root of 385961985 is about 728.0840387476.

The spelling of 385961985 in words is "three hundred eighty-five million, nine hundred sixty-one thousand, nine hundred eighty-five".