670475440 has 80 divisors (see below), whose sum is σ = 1639823616. Its totient is φ = 254592000.

The previous prime is 670475437. The next prime is 670475473. The reversal of 670475440 is 44574076.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 670475440.

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, 128890 + ... + 133990.

Almost surely, 2^670475440 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 670475440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (819911808).

670475440 is an abundant number, since it is smaller than the sum of its proper divisors (969348176).

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

670475440 is a wasteful number, since it uses less digits than its factorization.

670475440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5198 (or 5192 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 670475440 is about 25893.5405072385. The cubic root of 670475440 is about 875.2409415390.

The spelling of 670475440 in words is "six hundred seventy million, four hundred seventy-five thousand, four hundred forty".