436431 has 4 divisors (see below), whose sum is σ = 581912. Its totient is φ = 290952.

The previous prime is 436427. The next prime is 436439. The reversal of 436431 is 134634.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 436431 - 2² = 436427 is a prime.

It is a super-2 number, since 2×436431² = 380944035522, which contains 22 as substring.

It is a d-powerful number, because it can be written as 4⁷ + 3¹¹ + 4⁸ + 6³ + 3¹¹ + 1 .

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 436398 and 436407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (436439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72736 + ... + 72741.

It is an arithmetic number, because the mean of its divisors is an integer number (145478).

2⁴³⁶⁴³¹ is an apocalyptic number.

436431 is a deficient number, since it is larger than the sum of its proper divisors (145481).

436431 is a wasteful number, since it uses less digits than its factorization.

436431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145480.

The product of its digits is 864, while the sum is 21.

The square root of 436431 is about 660.6292454925. The cubic root of 436431 is about 75.8528431333.

The spelling of 436431 in words is "four hundred thirty-six thousand, four hundred thirty-one".