672816 has 40 divisors (see below), whose sum is σ = 1767744. Its totient is φ = 220480.

The previous prime is 672811. The next prime is 672817. The reversal of 672816 is 618276.

It is a happy number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (672811) by changing a digit.

672816 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 7 ways as a sum of consecutive naturals, for example, 5071 + ... + 5201.

2⁶⁷²⁸¹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 672816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (883872).

672816 is an abundant number, since it is smaller than the sum of its proper divisors (1094928).

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

672816 is a wasteful number, since it uses less digits than its factorization.

672816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 243 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 672816 is about 820.2536193154. The cubic root of 672816 is about 87.6258217075.

The spelling of 672816 in words is "six hundred seventy-two thousand, eight hundred sixteen".