305436 has 12 divisors (see below), whose sum is σ = 712712. Its totient is φ = 101808.

The previous prime is 305423. The next prime is 305441. The reversal of 305436 is 634503.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 305436.

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, 12715 + ... + 12738.

2³⁰⁵⁴³⁶ is an apocalyptic number.

It is an amenable number.

305436 is an abundant number, since it is smaller than the sum of its proper divisors (407276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

305436 is a wasteful number, since it uses less digits than its factorization.

305436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25460 (or 25458 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 305436 is about 552.6626457433. The cubic root of 305436 is about 67.3452146033.

Adding to 305436 its reverse (634503), we get a palindrome (939939).

It can be divided in two parts, 305 and 436, that added together give a triangular number (741 = T₃₈).

The spelling of 305436 in words is "three hundred five thousand, four hundred thirty-six".