383840 has 24 divisors (see below), whose sum is σ = 907200. Its totient is φ = 153472.

The previous prime is 383839. The next prime is 383869. The reversal of 383840 is 48383.

383840 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a congruent number.

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, 1040 + ... + 1359.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2³⁸³⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

383840 is an abundant number, since it is smaller than the sum of its proper divisors (523360).

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

383840 is a wasteful number, since it uses less digits than its factorization.

383840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414 (or 2406 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 383840 is about 619.5482224977. The cubic root of 383840 is about 72.6747271965.

The spelling of 383840 in words is "three hundred eighty-three thousand, eight hundred forty".