670388 has 6 divisors (see below), whose sum is σ = 1173186. Its totient is φ = 335192.

The previous prime is 670379. The next prime is 670399. The reversal of 670388 is 883076.

670388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 487204 + 183184 = 698^2 + 428^2 .

It is a congruent number.

It is an unprimeable number.

670388 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 as a sum of consecutive naturals, namely, 83795 + ... + 83802.

It is an arithmetic number, because the mean of its divisors is an integer number (195531).

2⁶⁷⁰³⁸⁸ is an apocalyptic number.

It is an amenable number.

670388 is a deficient number, since it is larger than the sum of its proper divisors (502798).

670388 is a wasteful number, since it uses less digits than its factorization.

670388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167601 (or 167599 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 670388 is about 818.7722516060. The cubic root of 670388 is about 87.5202891726.

The spelling of 670388 in words is "six hundred seventy thousand, three hundred eighty-eight".