670578840 has 96 divisors (see below), whose sum is σ = 2189416320. Its totient is φ = 177997824.

The previous prime is 670578833. The next prime is 670578841. The reversal of 670578840 is 48875076.

670578840 is a `hidden beast` number, since 6 + 70 + 578 + 8 + 4 + 0 = 666.

670578840 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 (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670578841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76104 + ... + 84456.

It is an arithmetic number, because the mean of its divisors is an integer number (22806420).

Almost surely, 2^670578840 is an apocalyptic number.

670578840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670578840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1094708160).

670578840 is an abundant number, since it is smaller than the sum of its proper divisors (1518837480).

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

670578840 is a wasteful number, since it uses less digits than its factorization.

670578840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8593 (or 8586 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 670578840 is about 25895.5370672245. The cubic root of 670578840 is about 875.2859321313.

The spelling of 670578840 in words is "six hundred seventy million, five hundred seventy-eight thousand, eight hundred forty".