385261578 has 48 divisors (see below), whose sum is σ = 929958120. Its totient is φ = 114452352.

The previous prime is 385261573. The next prime is 385261589. The reversal of 385261578 is 875162583.

385261578 is a `hidden beast` number, since 385 + 261 + 5 + 7 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 224910009 + 160351569 = 14997^2 + 12663^2 .

It is not an unprimeable number, because it can be changed into a prime (385261573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21601 + ... + 35172.

Almost surely, 2^385261578 is an apocalyptic number.

385261578 is an abundant number, since it is smaller than the sum of its proper divisors (544696542).

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

385261578 is a wasteful number, since it uses less digits than its factorization.

385261578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56823 (or 56820 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 385261578 is about 19628.0813631898. The cubic root of 385261578 is about 727.6433529105.

It can be divided in two parts, 38526 and 1578, that added together give a palindrome (40104).

The spelling of 385261578 in words is "three hundred eighty-five million, two hundred sixty-one thousand, five hundred seventy-eight".