670588820 has 48 divisors (see below), whose sum is σ = 1547380800. Its totient is φ = 242085120.

The previous prime is 670588811. The next prime is 670588859. The reversal of 670588820 is 28885076.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 19616 + ... + 41544.

It is an arithmetic number, because the mean of its divisors is an integer number (32237100).

Almost surely, 2^670588820 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 670588820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (773690400).

670588820 is an abundant number, since it is smaller than the sum of its proper divisors (876791980).

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

670588820 is a wasteful number, since it uses less digits than its factorization.

670588820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22088 (or 22086 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 670588820 is about 25895.7297638047. The cubic root of 670588820 is about 875.2902743054.

The spelling of 670588820 in words is "six hundred seventy million, five hundred eighty-eight thousand, eight hundred twenty".