670740 has 48 divisors (see below), whose sum is σ = 2147712. Its totient is φ = 153216.

The previous prime is 670739. The next prime is 670763. The reversal of 670740 is 47076.

It is a self number, because there is not a number n which added to its sum of digits gives 670740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379 + ... + 1218.

It is an arithmetic number, because the mean of its divisors is an integer number (44744).

2⁶⁷⁰⁷⁴⁰ is an apocalyptic number.

670740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

670740 is an abundant number, since it is smaller than the sum of its proper divisors (1476972).

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

670740 is a wasteful number, since it uses less digits than its factorization.

670740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 670740 is about 818.9871793868. The cubic root of 670740 is about 87.5356045578.

The spelling of 670740 in words is "six hundred seventy thousand, seven hundred forty".