384490 has 8 divisors (see below), whose sum is σ = 692100. Its totient is φ = 153792.

The previous prime is 384487. The next prime is 384497. The reversal of 384490 is 94483.

384490 = T₁₈₆ + T₁₈₇ + ... + T₂₀₅.

It can be written as a sum of positive squares in 2 ways, for example, as 321489 + 63001 = 567^2 + 251^2 .

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

It is not an unprimeable number, because it can be changed into a prime (384497) 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, 19215 + ... + 19234.

2³⁸⁴⁴⁹⁰ is an apocalyptic number.

384490 is a deficient number, since it is larger than the sum of its proper divisors (307610).

384490 is a wasteful number, since it uses less digits than its factorization.

384490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38456.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 384490 is about 620.0725763973. The cubic root of 384490 is about 72.7157268603.

The spelling of 384490 in words is "three hundred eighty-four thousand, four hundred ninety".