720687265 has 16 divisors (see below), whose sum is σ = 903026880. Its totient is φ = 551454400.

The previous prime is 720687263. The next prime is 720687311. The reversal of 720687265 is 562786027.

It is not a de Polignac number, because 720687265 - 2¹ = 720687263 is a prime.

It is a super-4 number, since 4×720687265⁴ (a number of 37 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (720687263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7711 + ... + 38740.

It is an arithmetic number, because the mean of its divisors is an integer number (56439180).

Almost surely, 2^720687265 is an apocalyptic number.

It is an amenable number.

720687265 is a deficient number, since it is larger than the sum of its proper divisors (182339615).

720687265 is a wasteful number, since it uses less digits than its factorization.

720687265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46592.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 720687265 is about 26845.6191025649. The cubic root of 720687265 is about 896.5660357180.

The spelling of 720687265 in words is "seven hundred twenty million, six hundred eighty-seven thousand, two hundred sixty-five".