381478390 has 32 divisors (see below), whose sum is σ = 724716000. Its totient is φ = 144177408.

The previous prime is 381478387. The next prime is 381478403. The reversal of 381478390 is 93874183.

It is a happy number.

381478390 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75256 + ... + 80164.

It is an arithmetic number, because the mean of its divisors is an integer number (22647375).

Almost surely, 2^381478390 is an apocalyptic number.

381478390 is a deficient number, since it is larger than the sum of its proper divisors (343237610).

381478390 is a wasteful number, since it uses less digits than its factorization.

381478390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5344.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 381478390 is about 19531.4717827408. The cubic root of 381478390 is about 725.2537455045.

The spelling of 381478390 in words is "three hundred eighty-one million, four hundred seventy-eight thousand, three hundred ninety".