80436 has 12 divisors (see below), whose sum is σ = 187712. Its totient is φ = 26808.

The previous prime is 80429. The next prime is 80447. The reversal of 80436 is 63408.

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

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

80436 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3340 + ... + 3363.

2⁸⁰⁴³⁶ is an apocalyptic number.

It is an amenable number.

80436 is an abundant number, since it is smaller than the sum of its proper divisors (107276).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93856).

80436 is a wasteful number, since it uses less digits than its factorization.

80436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6710 (or 6708 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 80436 is about 283.6124115761. The cubic root of 80436 is about 43.1668298187.

The spelling of 80436 in words is "eighty thousand, four hundred thirty-six".