383912640 has 84 divisors (see below), whose sum is σ = 1320509424. Its totient is φ = 102375936.

The previous prime is 383912623. The next prime is 383912647. The reversal of 383912640 is 46219383.

383912640 is a `hidden beast` number, since 3 + 8 + 3 + 9 + 1 + 2 + 640 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 383912595 and 383912604.

It is not an unprimeable number, because it can be changed into a prime (383912647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63772 + ... + 69531.

Almost surely, 2^383912640 is an apocalyptic number.

383912640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

383912640 is an abundant number, since it is smaller than the sum of its proper divisors (936596784).

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

383912640 is a wasteful number, since it uses less digits than its factorization.

383912640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133326 (or 133313 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 383912640 is about 19593.6887798087. The cubic root of 383912640 is about 726.7931136278.

The spelling of 383912640 in words is "three hundred eighty-three million, nine hundred twelve thousand, six hundred forty".