674784 has 96 divisors (see below), whose sum is σ = 2177280. Its totient is φ = 201600.

The previous prime is 674771. The next prime is 674789. The reversal of 674784 is 487476.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674789) by changing a digit.

674784 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 15 ways as a sum of consecutive naturals, for example, 9469 + ... + 9539.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2⁶⁷⁴⁷⁸⁴ 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 674784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1088640).

674784 is an abundant number, since it is smaller than the sum of its proper divisors (1502496).

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

674784 is a wasteful number, since it uses less digits than its factorization.

674784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 87 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 674784 is about 821.4523723260. The cubic root of 674784 is about 87.7111742914.

It can be divided in two parts, 67 and 4784, that added together give a triangular number (4851 = T₉₈).

The spelling of 674784 in words is "six hundred seventy-four thousand, seven hundred eighty-four".