670707440 has 40 divisors (see below), whose sum is σ = 1679350848. Its totient is φ = 247645440.

The previous prime is 670707431. The next prime is 670707487. The reversal of 670707440 is 44707076.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 670707440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321416 + ... + 323495.

Almost surely, 2^670707440 is an apocalyptic number.

It is an amenable number.

670707440 is an abundant number, since it is smaller than the sum of its proper divisors (1008643408).

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

670707440 is a wasteful number, since it uses less digits than its factorization.

670707440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644937 (or 644931 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 670707440 is about 25898.0200015368. The cubic root of 670707440 is about 875.3418810963.

The spelling of 670707440 in words is "six hundred seventy million, seven hundred seven thousand, four hundred forty".