383239840 has 48 divisors (see below), whose sum is σ = 958669992. Its totient is φ = 144277504.

The previous prime is 383239811. The next prime is 383239849. The reversal of 383239840 is 48932383.

383239840 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 4 ways, for example, as 360544144 + 22695696 = 18988^2 + 4764^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 383239793 and 383239802.

It is not an unprimeable number, because it can be changed into a prime (383239849) 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, 67729 + ... + 73168.

Almost surely, 2^383239840 is an apocalyptic number.

It is an amenable number.

383239840 is an abundant number, since it is smaller than the sum of its proper divisors (575430152).

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

383239840 is a wasteful number, since it uses less digits than its factorization.

383239840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140929 (or 140921 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 383239840 is about 19576.5124575344. The cubic root of 383239840 is about 726.3683014171.

The spelling of 383239840 in words is "three hundred eighty-three million, two hundred thirty-nine thousand, eight hundred forty".