671436 has 24 divisors (see below), whose sum is σ = 1741040. Its totient is φ = 223776.

The previous prime is 671431. The next prime is 671443. The reversal of 671436 is 634176.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (671431) by changing a digit.

671436 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 3001 + ... + 3216.

2⁶⁷¹⁴³⁶ is an apocalyptic number.

It is an amenable number.

671436 is an abundant number, since it is smaller than the sum of its proper divisors (1069604).

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

671436 is a wasteful number, since it uses less digits than its factorization.

671436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6230 (or 6222 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 671436 is about 819.4119842912. The cubic root of 671436 is about 87.5658714868.

The spelling of 671436 in words is "six hundred seventy-one thousand, four hundred thirty-six".