385280240 has 20 divisors (see below), whose sum is σ = 895776744. Its totient is φ = 154112064.

The previous prime is 385280227. The next prime is 385280249. The reversal of 385280240 is 42082583.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 385280197 and 385280206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385280249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2407922 + ... + 2408081.

Almost surely, 2^385280240 is an apocalyptic number.

It is an amenable number.

385280240 is an abundant number, since it is smaller than the sum of its proper divisors (510496504).

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

385280240 is a wasteful number, since it uses less digits than its factorization.

385280240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4816016 (or 4816010 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 385280240 is about 19628.5567477591. The cubic root of 385280240 is about 727.6551016909.

The spelling of 385280240 in words is "three hundred eighty-five million, two hundred eighty thousand, two hundred forty".