670138 has 16 divisors (see below), whose sum is σ = 1160064. Its totient is φ = 284400.

The previous prime is 670129. The next prime is 670139. The reversal of 670138 is 831076.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1956 + ... + 2272.

It is an arithmetic number, because the mean of its divisors is an integer number (72504).

2⁶⁷⁰¹³⁸ is an apocalyptic number.

670138 is a deficient number, since it is larger than the sum of its proper divisors (489926).

670138 is a wasteful number, since it uses less digits than its factorization.

670138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 670138 is about 818.6195697636. The cubic root of 670138 is about 87.5094085121.

It can be divided in two parts, 670 and 138, that added together give a palindrome (808).

The spelling of 670138 in words is "six hundred seventy thousand, one hundred thirty-eight".