672784 has 20 divisors (see below), whose sum is σ = 1489984. Its totient is φ = 288288.

The previous prime is 672781. The next prime is 672787. The reversal of 672784 is 487276.

It is an interprime number because it is at equal distance from previous prime (672781) and next prime (672787).

It is an Ulam number.

It is a nialpdrome in base 16.

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

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2892 + ... + 3115.

2⁶⁷²⁷⁸⁴ is an apocalyptic number.

It is an amenable number.

672784 is an abundant number, since it is smaller than the sum of its proper divisors (817200).

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

672784 is a wasteful number, since it uses less digits than its factorization.

672784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6022 (or 6016 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 672784 is about 820.2341129214. The cubic root of 672784 is about 87.6244324863.

The spelling of 672784 in words is "six hundred seventy-two thousand, seven hundred eighty-four".