381829491 has 32 divisors (see below), whose sum is σ = 602208000. Its totient is φ = 238417344.

The previous prime is 381829477. The next prime is 381829501. The reversal of 381829491 is 194928183.

381829491 is a `hidden beast` number, since 3 + 81 + 82 + 9 + 491 = 666.

It is not a de Polignac number, because 381829491 - 2¹⁰ = 381828467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381829411) 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 31 ways as a sum of consecutive naturals, for example, 41476 + ... + 49838.

It is an arithmetic number, because the mean of its divisors is an integer number (18819000).

Almost surely, 2^381829491 is an apocalyptic number.

381829491 is a deficient number, since it is larger than the sum of its proper divisors (220378509).

381829491 is a wasteful number, since it uses less digits than its factorization.

381829491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8480 (or 8474 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 381829491 is about 19540.4577991407. The cubic root of 381829491 is about 725.4761777067.

The spelling of 381829491 in words is "three hundred eighty-one million, eight hundred twenty-nine thousand, four hundred ninety-one".