670395648 has 144 divisors (see below), whose sum is σ = 1947032640. Its totient is φ = 203538432.

The previous prime is 670395631. The next prime is 670395653. The reversal of 670395648 is 846593076.

670395648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 670395597 and 670395606.

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, 828268 + ... + 829076.

It is an arithmetic number, because the mean of its divisors is an integer number (13521060).

Almost surely, 2^670395648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670395648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (973516320).

670395648 is an abundant number, since it is smaller than the sum of its proper divisors (1276636992).

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

670395648 is a wasteful number, since it uses less digits than its factorization.

670395648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924 (or 910 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 670395648 is about 25891.9996910243. Note that the first 3 decimals coincide. The cubic root of 670395648 is about 875.2062199113.

The spelling of 670395648 in words is "six hundred seventy million, three hundred ninety-five thousand, six hundred forty-eight".