381081830 has 8 divisors (see below), whose sum is σ = 685947312. Its totient is φ = 152432728.

The previous prime is 381081829. The next prime is 381081851. The reversal of 381081830 is 38180183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×381081830² = 290446722312297800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19054082 + ... + 19054101.

It is an arithmetic number, because the mean of its divisors is an integer number (85743414).

Almost surely, 2^381081830 is an apocalyptic number.

381081830 is a deficient number, since it is larger than the sum of its proper divisors (304865482).

381081830 is a wasteful number, since it uses less digits than its factorization.

381081830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38108190.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 381081830 is about 19521.3173223530. The cubic root of 381081830 is about 725.0023495762.

The spelling of 381081830 in words is "three hundred eighty-one million, eighty-one thousand, eight hundred thirty".