720772405 has 8 divisors (see below), whose sum is σ = 865533312. Its totient is φ = 576213648.

The previous prime is 720772397. The next prime is 720772427. The reversal of 720772405 is 504277027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 720772405 - 2³ = 720772397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42577 + ... + 57046.

It is an arithmetic number, because the mean of its divisors is an integer number (108191664).

Almost surely, 2^720772405 is an apocalyptic number.

It is an amenable number.

720772405 is a deficient number, since it is larger than the sum of its proper divisors (144760907).

720772405 is a wasteful number, since it uses less digits than its factorization.

720772405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101075.

The product of its (nonzero) digits is 27440, while the sum is 34.

The square root of 720772405 is about 26847.2047893258. The cubic root of 720772405 is about 896.6013402716.

The spelling of 720772405 in words is "seven hundred twenty million, seven hundred seventy-two thousand, four hundred five".