670788 has 24 divisors (see below), whose sum is σ = 1739360. Its totient is φ = 223560.

The previous prime is 670781. The next prime is 670811. The reversal of 670788 is 887076.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (670781) by changing a digit.

670788 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 7 ways as a sum of consecutive naturals, for example, 2998 + ... + 3213.

2⁶⁷⁰⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

670788 is an abundant number, since it is smaller than the sum of its proper divisors (1068572).

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

670788 is a wasteful number, since it uses less digits than its factorization.

670788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6224 (or 6216 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 670788 is about 819.0164833506. The cubic root of 670788 is about 87.5376926043.

The spelling of 670788 in words is "six hundred seventy thousand, seven hundred eighty-eight".