383388782640 has 160 divisors (see below), whose sum is σ = 1209350096640. Its totient is φ = 100445918208.

The previous prime is 383388782591. The next prime is 383388782657. The reversal of 383388782640 is 46287883383.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27930819 + ... + 27944541.

It is an arithmetic number, because the mean of its divisors is an integer number (7558438104).

Almost surely, 2^383388782640 is an apocalyptic number.

383388782640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 383388782640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (604675048320).

383388782640 is an abundant number, since it is smaller than the sum of its proper divisors (825961314000).

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

383388782640 is a wasteful number, since it uses less digits than its factorization.

383388782640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15771 (or 15765 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 60.

The spelling of 383388782640 in words is "three hundred eighty-three billion, three hundred eighty-eight million, seven hundred eighty-two thousand, six hundred forty".