720605970 has 160 divisors (see below), whose sum is σ = 2331331200. Its totient is φ = 156017664.

The previous prime is 720605959. The next prime is 720605983. The reversal of 720605970 is 79506027.

720605970 is a `hidden beast` number, since 7 + 2 + 0 + 60 + 597 + 0 = 666.

720605970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 104386 + ... + 111074.

It is an arithmetic number, because the mean of its divisors is an integer number (14570820).

Almost surely, 2^720605970 is an apocalyptic number.

720605970 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 720605970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1165665600).

720605970 is an abundant number, since it is smaller than the sum of its proper divisors (1610725230).

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

720605970 is a wasteful number, since it uses less digits than its factorization.

720605970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6734 (or 6725 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 720605970 is about 26844.1049394462. The cubic root of 720605970 is about 896.5323229552.

The spelling of 720605970 in words is "seven hundred twenty million, six hundred five thousand, nine hundred seventy".