670406 has 16 divisors (see below), whose sum is σ = 1133568. Its totient is φ = 294600.

The previous prime is 670399. The next prime is 670409. The reversal of 670406 is 604076.

670406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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

670406 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 7 ways as a sum of consecutive naturals, for example, 191 + ... + 1173.

It is an arithmetic number, because the mean of its divisors is an integer number (70848).

2⁶⁷⁰⁴⁰⁶ is an apocalyptic number.

670406 is a deficient number, since it is larger than the sum of its proper divisors (463162).

670406 is a wasteful number, since it uses less digits than its factorization.

670406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 670406 is about 818.7832435999. The cubic root of 670406 is about 87.5210724758.

The spelling of 670406 in words is "six hundred seventy thousand, four hundred six".