381999360 has 144 divisors (see below), whose sum is σ = 1259758080. Its totient is φ = 98549760.

The previous prime is 381999323. The next prime is 381999379. The reversal of 381999360 is 63999183.

It is a happy number.

It is a super-2 number, since 2×381999360² = 291847022080819200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 117436 + ... + 120644.

It is an arithmetic number, because the mean of its divisors is an integer number (8748320).

Almost surely, 2^381999360 is an apocalyptic number.

381999360 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 381999360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (629879040).

381999360 is an abundant number, since it is smaller than the sum of its proper divisors (877758720).

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

381999360 is a wasteful number, since it uses less digits than its factorization.

381999360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264 (or 3250 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 381999360 is about 19544.8039130609. The cubic root of 381999360 is about 725.5837454781.

The spelling of 381999360 in words is "three hundred eighty-one million, nine hundred ninety-nine thousand, three hundred sixty".