383804720640 has 720 divisors, whose sum is σ = 1508517698688. Its totient is φ = 90021888000.

The previous prime is 383804720617. The next prime is 383804720647. The reversal of 383804720640 is 46027408383.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383804720647) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 86420820 + ... + 86425260.

Almost surely, 2^383804720640 is an apocalyptic number.

383804720640 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 383804720640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (754258849344).

383804720640 is an abundant number, since it is smaller than the sum of its proper divisors (1124712978048).

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

383804720640 is a wasteful number, since it uses less digits than its factorization.

383804720640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4523 (or 4493 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 383804720640 in words is "three hundred eighty-three billion, eight hundred four million, seven hundred twenty thousand, six hundred forty".