394831835381 has 8 divisors (see below), whose sum is σ = 396953921280. Its totient is φ = 392712888672.

The previous prime is 394831835353. The next prime is 394831835449. The reversal of 394831835381 is 183538138493.

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

It is a cyclic number.

It is not a de Polignac number, because 394831835381 - 2²² = 394827641077 is a prime.

It is a super-2 number, since 2×394831835381² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394831835311) 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, 532355 + ... + 1035888.

It is an arithmetic number, because the mean of its divisors is an integer number (49619240160).

Almost surely, 2^394831835381 is an apocalyptic number.

It is an amenable number.

394831835381 is a deficient number, since it is larger than the sum of its proper divisors (2122085899).

394831835381 is a wasteful number, since it uses less digits than its factorization.

394831835381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569595.

The product of its digits is 7464960, while the sum is 56.

The spelling of 394831835381 in words is "three hundred ninety-four billion, eight hundred thirty-one million, eight hundred thirty-five thousand, three hundred eighty-one".