385040 has 20 divisors (see below), whose sum is σ = 895404. Its totient is φ = 153984.

The previous prime is 385039. The next prime is 385057. The reversal of 385040 is 40583.

385040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 215296 + 169744 = 464^2 + 412^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2327 + ... + 2486.

2³⁸⁵⁰⁴⁰ is an apocalyptic number.

It is an amenable number.

385040 is an abundant number, since it is smaller than the sum of its proper divisors (510364).

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

385040 is a wasteful number, since it uses less digits than its factorization.

385040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826 (or 4820 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 385040 is about 620.5159143809. The cubic root of 385040 is about 72.7503828072.

The spelling of 385040 in words is "three hundred eighty-five thousand, forty".