670194720 has 144 divisors (see below), whose sum is σ = 2463034392. Its totient is φ = 164966400.

The previous prime is 670194697. The next prime is 670194779. The reversal of 670194720 is 27491076.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 305690256 + 364504464 = 17484^2 + 19092^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 820 + ... + 36620.

Almost surely, 2^670194720 is an apocalyptic number.

670194720 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 670194720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1231517196).

670194720 is an abundant number, since it is smaller than the sum of its proper divisors (1792839672).

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

670194720 is a wasteful number, since it uses less digits than its factorization.

670194720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35835 (or 35824 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 670194720 is about 25888.1192827907. The cubic root of 670194720 is about 875.1187735367.

The spelling of 670194720 in words is "six hundred seventy million, one hundred ninety-four thousand, seven hundred twenty".