670530 has 64 divisors (see below), whose sum is σ = 1916928. Its totient is φ = 146880.

The previous prime is 670517. The next prime is 670541. The reversal of 670530 is 35076.

It is a super-2 number, since 2×670530² = 899220961800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 670497 and 670506.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 670530.

It is an unprimeable number.

670530 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 31 ways as a sum of consecutive naturals, for example, 6459 + ... + 6561.

It is an arithmetic number, because the mean of its divisors is an integer number (29952).

2⁶⁷⁰⁵³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (958464).

670530 is an abundant number, since it is smaller than the sum of its proper divisors (1246398).

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

670530 is a wasteful number, since it uses less digits than its factorization.

670530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 670530 is about 818.8589622151. The cubic root of 670530 is about 87.5264681832.

The spelling of 670530 in words is "six hundred seventy thousand, five hundred thirty".