381478356 has 96 divisors (see below), whose sum is σ = 1137024000. Its totient is φ = 108346464.

The previous prime is 381478277. The next prime is 381478373. The reversal of 381478356 is 653874183.

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 31 ways as a sum of consecutive naturals, for example, 133915 + ... + 136733.

It is an arithmetic number, because the mean of its divisors is an integer number (11844000).

Almost surely, 2^381478356 is an apocalyptic number.

381478356 is a gapful number since it is divisible by the number (36) 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 381478356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (568512000).

381478356 is an abundant number, since it is smaller than the sum of its proper divisors (755545644).

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

381478356 is a wasteful number, since it uses less digits than its factorization.

381478356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018 (or 3010 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 381478356 is about 19531.4709123507. The cubic root of 381478356 is about 725.2537239580.

The spelling of 381478356 in words is "three hundred eighty-one million, four hundred seventy-eight thousand, three hundred fifty-six".