381564846 has 24 divisors (see below), whose sum is σ = 890318520. Its totient is φ = 117404496.

The previous prime is 381564823. The next prime is 381564851. The reversal of 381564846 is 648465183.

381564846 is a `hidden beast` number, since 3 + 8 + 1 + 564 + 84 + 6 = 666.

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 11 ways as a sum of consecutive naturals, for example, 815076 + ... + 815543.

It is an arithmetic number, because the mean of its divisors is an integer number (37096605).

Almost surely, 2^381564846 is an apocalyptic number.

381564846 is an abundant number, since it is smaller than the sum of its proper divisors (508753674).

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

381564846 is a wasteful number, since it uses less digits than its factorization.

381564846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630640 (or 1630637 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 381564846 is about 19533.6849058236. The cubic root of 381564846 is about 725.3085304353.

The spelling of 381564846 in words is "three hundred eighty-one million, five hundred sixty-four thousand, eight hundred forty-six".