674440 has 32 divisors (see below), whose sum is σ = 1635480. Its totient is φ = 248832.

The previous prime is 674431. The next prime is 674449. The reversal of 674440 is 44476.

674440 = 205² + 206² + ... + 219².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (674431) and next prime (674449).

It can be written as a sum of positive squares in 4 ways, for example, as 617796 + 56644 = 786^2 + 238^2 .

It is not an unprimeable number, because it can be changed into a prime (674449) 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, 129 + ... + 1168.

2⁶⁷⁴⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

674440 is an abundant number, since it is smaller than the sum of its proper divisors (961040).

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

674440 is a wasteful number, since it uses less digits than its factorization.

674440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321 (or 1317 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 674440 is about 821.2429603960. The cubic root of 674440 is about 87.6962669172.

The spelling of 674440 in words is "six hundred seventy-four thousand, four hundred forty".