670408 has 16 divisors (see below), whose sum is σ = 1284480. Its totient is φ = 327888.

The previous prime is 670399. The next prime is 670409. The reversal of 670408 is 804076.

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

670408 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 3 ways as a sum of consecutive naturals, for example, 516 + ... + 1267.

It is an arithmetic number, because the mean of its divisors is an integer number (80280).

2⁶⁷⁰⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

670408 is a deficient number, since it is larger than the sum of its proper divisors (614072).

670408 is a wasteful number, since it uses less digits than its factorization.

670408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836 (or 1832 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 670408 is about 818.7844649235. The cubic root of 670408 is about 87.5211595086.

The spelling of 670408 in words is "six hundred seventy thousand, four hundred eight".