672786 has 20 divisors (see below), whose sum is σ = 1507902. Its totient is φ = 224208.

The previous prime is 672781. The next prime is 672787. The reversal of 672786 is 687276.

It can be written as a sum of positive squares in only one way, i.e., 670761 + 2025 = 819^2 + 45^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 672786.

It is not an unprimeable number, because it can be changed into a prime (672781) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1915 + ... + 2238.

2⁶⁷²⁷⁸⁶ is an apocalyptic number.

672786 is an abundant number, since it is smaller than the sum of its proper divisors (835116).

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

672786 is a wasteful number, since it uses less digits than its factorization.

672786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167 (or 4158 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 672786 is about 820.2353320846. The cubic root of 672786 is about 87.6245193139.

The spelling of 672786 in words is "six hundred seventy-two thousand, seven hundred eighty-six".