720105715 has 12 divisors (see below), whose sum is σ = 1005209136. Its totient is φ = 493786608.

The previous prime is 720105709. The next prime is 720105731. The reversal of 720105715 is 517501027.

It is not a de Polignac number, because 720105715 - 2⁷ = 720105587 is a prime.

It is a super-2 number, since 2×720105715² = 1037104481551322450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1469359 + ... + 1469848.

It is an arithmetic number, because the mean of its divisors is an integer number (83767428).

Almost surely, 2^720105715 is an apocalyptic number.

720105715 is a deficient number, since it is larger than the sum of its proper divisors (285103421).

720105715 is a wasteful number, since it uses less digits than its factorization.

720105715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939226 (or 2939219 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 720105715 is about 26834.7855404138. The cubic root of 720105715 is about 896.3248130631.

The spelling of 720105715 in words is "seven hundred twenty million, one hundred five thousand, seven hundred fifteen".