436385 has 4 divisors (see below), whose sum is σ = 523668. Its totient is φ = 349104.

The previous prime is 436357. The next prime is 436399. The reversal of 436385 is 583634.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583634 = 2 ⋅291817.

It can be written as a sum of positive squares in 2 ways, for example, as 312481 + 123904 = 559^2 + 352^2 .

It is a cyclic number.

It is not a de Polignac number, because 436385 - 2¹⁴ = 420001 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43634 + ... + 43643.

It is an arithmetic number, because the mean of its divisors is an integer number (130917).

2⁴³⁶³⁸⁵ is an apocalyptic number.

It is an amenable number.

436385 is a deficient number, since it is larger than the sum of its proper divisors (87283).

436385 is an equidigital number, since it uses as much as digits as its factorization.

436385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87282.

The product of its digits is 8640, while the sum is 29.

The square root of 436385 is about 660.5944292832. The cubic root of 436385 is about 75.8501780665.

The spelling of 436385 in words is "four hundred thirty-six thousand, three hundred eighty-five".