670390 has 32 divisors (see below), whose sum is σ = 1410624. Its totient is φ = 224640.

The previous prime is 670379. The next prime is 670399. The reversal of 670390 is 93076.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670399) by changing a digit.

670390 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 15 ways as a sum of consecutive naturals, for example, 4192 + ... + 4348.

It is an arithmetic number, because the mean of its divisors is an integer number (44082).

2⁶⁷⁰³⁹⁰ is an apocalyptic number.

670390 is an abundant number, since it is smaller than the sum of its proper divisors (740234).

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

670390 is a wasteful number, since it uses less digits than its factorization.

670390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 670390 is about 818.7734729460. The cubic root of 670390 is about 87.5203762070.

The spelling of 670390 in words is "six hundred seventy thousand, three hundred ninety".