381898806 has 8 divisors (see below), whose sum is σ = 763797624. Its totient is φ = 127299600.

The previous prime is 381898801. The next prime is 381898819. The reversal of 381898806 is 608898183.

It is a happy number.

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

381898806 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381898801) 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 3 ways as a sum of consecutive naturals, for example, 31824895 + ... + 31824906.

It is an arithmetic number, because the mean of its divisors is an integer number (95474703).

Almost surely, 2^381898806 is an apocalyptic number.

381898806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

381898806 is a wasteful number, since it uses less digits than its factorization.

381898806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63649806.

The product of its (nonzero) digits is 663552, while the sum is 51.

The square root of 381898806 is about 19542.2313464967. The cubic root of 381898806 is about 725.5200745593.

The spelling of 381898806 in words is "three hundred eighty-one million, eight hundred ninety-eight thousand, eight hundred six".