674128 has 40 divisors (see below), whose sum is σ = 1611008. Its totient is φ = 266112.

The previous prime is 674123. The next prime is 674131. The reversal of 674128 is 821476.

674128 is nontrivially palindromic in base 3.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 674096 and 674105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1225 + ... + 1687.

2⁶⁷⁴¹²⁸ 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 674128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (805504).

674128 is an abundant number, since it is smaller than the sum of its proper divisors (936880).

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

674128 is a wasteful number, since it uses less digits than its factorization.

674128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 485 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 674128 is about 821.0529824561. The cubic root of 674128 is about 87.6827418913.

The spelling of 674128 in words is "six hundred seventy-four thousand, one hundred twenty-eight".