384436409 has 6 divisors (see below), whose sum is σ = 447201594. Its totient is φ = 329516880.

The previous prime is 384436379. The next prime is 384436411. The reversal of 384436409 is 904634483.

It can be written as a sum of positive squares in only one way, i.e., 232654009 + 151782400 = 15253^2 + 12320^2 .

It is not a de Polignac number, because 384436409 - 2¹² = 384432313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (384436439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3922772 + ... + 3922869.

It is an arithmetic number, because the mean of its divisors is an integer number (74533599).

Almost surely, 2^384436409 is an apocalyptic number.

It is an amenable number.

384436409 is a deficient number, since it is larger than the sum of its proper divisors (62765185).

384436409 is an equidigital number, since it uses as much as digits as its factorization.

384436409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7845655 (or 7845648 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 41.

The square root of 384436409 is about 19607.0499820855. The cubic root of 384436409 is about 727.1234828125.

The spelling of 384436409 in words is "three hundred eighty-four million, four hundred thirty-six thousand, four hundred nine".