670961440 has 96 divisors (see below), whose sum is σ = 1766862720. Its totient is φ = 239284224.

The previous prime is 670961399. The next prime is 670961507. The reversal of 670961440 is 44169076.

It is a self number, because there is not a number n which added to its sum of digits gives 670961440.

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, 45189 + ... + 58171.

It is an arithmetic number, because the mean of its divisors is an integer number (18404820).

Almost surely, 2^670961440 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 670961440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (883431360).

670961440 is an abundant number, since it is smaller than the sum of its proper divisors (1095901280).

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

670961440 is a wasteful number, since it uses less digits than its factorization.

670961440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13034 (or 13026 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 670961440 is about 25902.9233871391. The cubic root of 670961440 is about 875.4523658192.

The spelling of 670961440 in words is "six hundred seventy million, nine hundred sixty-one thousand, four hundred forty".