381043806 has 64 divisors (see below), whose sum is σ = 934295040. Its totient is φ = 101946240.

The previous prime is 381043777. The next prime is 381043913. The reversal of 381043806 is 608340183.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10080 + ... + 29388.

It is an arithmetic number, because the mean of its divisors is an integer number (14598360).

Almost surely, 2^381043806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381043806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (467147520).

381043806 is an abundant number, since it is smaller than the sum of its proper divisors (553251234).

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

381043806 is a wasteful number, since it uses less digits than its factorization.

381043806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19361.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 381043806 is about 19520.3433883731. The cubic root of 381043806 is about 724.9782354148.

Adding to 381043806 its reverse (608340183), we get a palindrome (989383989).

The spelling of 381043806 in words is "three hundred eighty-one million, forty-three thousand, eight hundred six".