670736 has 40 divisors (see below), whose sum is σ = 1470144. Its totient is φ = 293760.

The previous prime is 670729. The next prime is 670739. The reversal of 670736 is 637076.

It is a junction number, because it is equal to n+sod(n) for n = 670699 and 670708.

It is not an unprimeable number, because it can be changed into a prime (670739) 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, 6461 + ... + 6563.

2⁶⁷⁰⁷³⁶ 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 670736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (735072).

670736 is an abundant number, since it is smaller than the sum of its proper divisors (799408).

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

670736 is a wasteful number, since it uses less digits than its factorization.

670736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 670736 is about 818.9847373425. The cubic root of 670736 is about 87.5354305495.

The spelling of 670736 in words is "six hundred seventy thousand, seven hundred thirty-six".