705726720 has 108 divisors (see below), whose sum is σ = 2441780796. Its totient is φ = 188190720.

The previous prime is 705726719. The next prime is 705726731. The reversal of 705726720 is 27627507.

705726720 is a `hidden beast` number, since 7 + 0 + 572 + 67 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 192432384 + 513294336 = 13872^2 + 22656^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19111 + ... + 42150.

Almost surely, 2^705726720 is an apocalyptic number.

It is an amenable number.

705726720 is an abundant number, since it is smaller than the sum of its proper divisors (1736054076).

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

705726720 is a wasteful number, since it uses less digits than its factorization.

705726720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61288 (or 61271 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 705726720 is about 26565.5174991943. The cubic root of 705726720 is about 890.3187512895.

The spelling of 705726720 in words is "seven hundred five million, seven hundred twenty-six thousand, seven hundred twenty".