381184380 has 144 divisors (see below), whose sum is σ = 1228971744. Its totient is φ = 99118080.

The previous prime is 381184361. The next prime is 381184393. The reversal of 381184380 is 83481183.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 198304 + ... + 200216.

It is an arithmetic number, because the mean of its divisors is an integer number (8534526).

Almost surely, 2^381184380 is an apocalyptic number.

381184380 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 381184380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (614485872).

381184380 is an abundant number, since it is smaller than the sum of its proper divisors (847787364).

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

381184380 is a wasteful number, since it uses less digits than its factorization.

381184380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978 (or 1964 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 381184380 is about 19523.9437614433. The cubic root of 381184380 is about 725.0673770121.

The spelling of 381184380 in words is "three hundred eighty-one million, one hundred eighty-four thousand, three hundred eighty".