670446 has 48 divisors (see below), whose sum is σ = 1763424. Its totient is φ = 179712.

The previous prime is 670409. The next prime is 670447. The reversal of 670446 is 644076.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 670446.

It is not an unprimeable number, because it can be changed into a prime (670447) by changing a digit.

670446 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 23 ways as a sum of consecutive naturals, for example, 1986 + ... + 2298.

It is an arithmetic number, because the mean of its divisors is an integer number (36738).

2⁶⁷⁰⁴⁴⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (881712).

670446 is an abundant number, since it is smaller than the sum of its proper divisors (1092978).

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

670446 is a wasteful number, since it uses less digits than its factorization.

670446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 670446 is about 818.8076697247. The cubic root of 670446 is about 87.5228130992.

The spelling of 670446 in words is "six hundred seventy thousand, four hundred forty-six".