381219930 has 192 divisors, whose sum is σ = 1235969280. Its totient is φ = 79377408.

The previous prime is 381219929. The next prime is 381219967. The reversal of 381219930 is 39912183.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 728649 + ... + 729171.

It is an arithmetic number, because the mean of its divisors is an integer number (6437340).

Almost surely, 2^381219930 is an apocalyptic number.

381219930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 381219930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (617984640).

381219930 is an abundant number, since it is smaller than the sum of its proper divisors (854749350).

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

381219930 is a wasteful number, since it uses less digits than its factorization.

381219930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 381219930 is about 19524.8541607870. The cubic root of 381219930 is about 725.0899167114.

The spelling of 381219930 in words is "three hundred eighty-one million, two hundred nineteen thousand, nine hundred thirty".