384647457 has 16 divisors (see below), whose sum is σ = 571613760. Its totient is φ = 228644352.

The previous prime is 384647443. The next prime is 384647477. The reversal of 384647457 is 754746483.

It is a happy number.

It is not a de Polignac number, because 384647457 - 2⁴ = 384647441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (384647437) 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 15 ways as a sum of consecutive naturals, for example, 197508 + ... + 199445.

It is an arithmetic number, because the mean of its divisors is an integer number (35725860).

Almost surely, 2^384647457 is an apocalyptic number.

It is an amenable number.

384647457 is a deficient number, since it is larger than the sum of its proper divisors (186966303).

384647457 is a wasteful number, since it uses less digits than its factorization.

384647457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396992.

The product of its digits is 2257920, while the sum is 48.

The square root of 384647457 is about 19612.4311853477. The cubic root of 384647457 is about 727.2565172841.

The spelling of 384647457 in words is "three hundred eighty-four million, six hundred forty-seven thousand, four hundred fifty-seven".