381707392 has 128 divisors (see below), whose sum is σ = 904193280. Its totient is φ = 158515200.

The previous prime is 381707377. The next prime is 381707393. The reversal of 381707392 is 293707183.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (381707393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 885417 + ... + 885847.

It is an arithmetic number, because the mean of its divisors is an integer number (7064010).

Almost surely, 2^381707392 is an apocalyptic number.

381707392 is a gapful number since it is divisible by the number (32) 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 381707392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (452096640).

381707392 is an abundant number, since it is smaller than the sum of its proper divisors (522485888).

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

381707392 is a wasteful number, since it uses less digits than its factorization.

381707392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 381707392 is about 19537.3332878364. Note that the first 3 decimals coincide. The cubic root of 381707392 is about 725.3988400805.

The spelling of 381707392 in words is "three hundred eighty-one million, seven hundred seven thousand, three hundred ninety-two".