381694456 has 64 divisors (see below), whose sum is σ = 848786400. Its totient is φ = 158630400.

The previous prime is 381694447. The next prime is 381694457. The reversal of 381694456 is 654496183.

It is a super-2 number, since 2×381694456² = 291381315482271872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381694457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123166 + ... + 126226.

Almost surely, 2^381694456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381694456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (424393200).

381694456 is an abundant number, since it is smaller than the sum of its proper divisors (467091944).

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

381694456 is a wasteful number, since it uses less digits than its factorization.

381694456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200 (or 3196 counting only the distinct ones).

The product of its digits is 622080, while the sum is 46.

The square root of 381694456 is about 19537.0022265444. The cubic root of 381694456 is about 725.3906454392.

The spelling of 381694456 in words is "three hundred eighty-one million, six hundred ninety-four thousand, four hundred fifty-six".