381546826 has 32 divisors (see below), whose sum is σ = 599658048. Its totient is φ = 181923840.

The previous prime is 381546811. The next prime is 381546859. The reversal of 381546826 is 628645183.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1348081 + ... + 1348363.

It is an arithmetic number, because the mean of its divisors is an integer number (18739314).

Almost surely, 2^381546826 is an apocalyptic number.

381546826 is a deficient number, since it is larger than the sum of its proper divisors (218111222).

381546826 is a wasteful number, since it uses less digits than its factorization.

381546826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646.

The product of its digits is 276480, while the sum is 43.

The square root of 381546826 is about 19533.2236458809. The cubic root of 381546826 is about 725.2971123102.

The spelling of 381546826 in words is "three hundred eighty-one million, five hundred forty-six thousand, eight hundred twenty-six".