674040 has 64 divisors (see below), whose sum is σ = 2086560. Its totient is φ = 174080.

The previous prime is 674017. The next prime is 674057. The reversal of 674040 is 40476.

It is a Cunningham number, because it is equal to 821²-1.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 673998 and 674016.

It is a congruent number.

It is an unprimeable number.

674040 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, 4852 + ... + 4988.

2⁶⁷⁴⁰⁴⁰ is an apocalyptic number.

674040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 674040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1043280).

674040 is an abundant number, since it is smaller than the sum of its proper divisors (1412520).

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

674040 is a wasteful number, since it uses less digits than its factorization.

674040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 674040 is about 820.9993909864. Note that the first 3 decimals coincide. The cubic root of 674040 is about 87.6789263859.

The spelling of 674040 in words is "six hundred seventy-four thousand, forty".