670404 has 48 divisors (see below), whose sum is σ = 1870848. Its totient is φ = 182688.

The previous prime is 670399. The next prime is 670409. The reversal of 670404 is 404076.

It is an interprime number because it is at equal distance from previous prime (670399) and next prime (670409).

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

It is not an unprimeable number, because it can be changed into a prime (670409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1759 + ... + 2105.

It is an arithmetic number, because the mean of its divisors is an integer number (38976).

2⁶⁷⁰⁴⁰⁴ 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 670404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (935424).

670404 is an abundant number, since it is smaller than the sum of its proper divisors (1200444).

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

670404 is a wasteful number, since it uses less digits than its factorization.

670404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384 (or 382 counting only the distinct ones).

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

The square root of 670404 is about 818.7820222745. The cubic root of 670404 is about 87.5209854428.

The spelling of 670404 in words is "six hundred seventy thousand, four hundred four".