385780040 has 32 divisors (see below), whose sum is σ = 897939000. Its totient is φ = 148990464.

The previous prime is 385780039. The next prime is 385780049. The reversal of 385780040 is 40087583.

It can be written as a sum of positive squares in 4 ways, for example, as 251729956 + 134050084 = 15866^2 + 11578^2 .

It is not an unprimeable number, because it can be changed into a prime (385780049) 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, 165125 + ... + 167444.

Almost surely, 2^385780040 is an apocalyptic number.

It is an amenable number.

385780040 is an abundant number, since it is smaller than the sum of its proper divisors (512158960).

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

385780040 is a wasteful number, since it uses less digits than its factorization.

385780040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332609 (or 332605 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 385780040 is about 19641.2840720763. The cubic root of 385780040 is about 727.9696129087.

The spelling of 385780040 in words is "three hundred eighty-five million, seven hundred eighty thousand, forty".