381978843 has 8 divisors (see below), whose sum is σ = 511287888. Its totient is φ = 253661184.

The previous prime is 381978809. The next prime is 381978853. The reversal of 381978843 is 348879183.

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

It is not a de Polignac number, because 381978843 - 2¹³ = 381970651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381978853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246946 + ... + 248487.

It is an arithmetic number, because the mean of its divisors is an integer number (63910986).

Almost surely, 2^381978843 is an apocalyptic number.

381978843 is a deficient number, since it is larger than the sum of its proper divisors (129309045).

381978843 is a wasteful number, since it uses less digits than its factorization.

381978843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495693.

The product of its digits is 1161216, while the sum is 51.

The square root of 381978843 is about 19544.2790350527. The cubic root of 381978843 is about 725.5707549954.

The spelling of 381978843 in words is "three hundred eighty-one million, nine hundred seventy-eight thousand, eight hundred forty-three".