720405575 has 6 divisors (see below), whose sum is σ = 893302944. Its totient is φ = 576324440.

The previous prime is 720405571. The next prime is 720405589. The reversal of 720405575 is 575504027.

It is a happy number.

It is not a de Polignac number, because 720405575 - 2² = 720405571 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720405571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14408087 + ... + 14408136.

It is an arithmetic number, because the mean of its divisors is an integer number (148883824).

Almost surely, 2^720405575 is an apocalyptic number.

720405575 is a deficient number, since it is larger than the sum of its proper divisors (172897369).

720405575 is a wasteful number, since it uses less digits than its factorization.

720405575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28816233 (or 28816228 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 35.

The square root of 720405575 is about 26840.3721099392. The cubic root of 720405575 is about 896.4492089932.

The spelling of 720405575 in words is "seven hundred twenty million, four hundred five thousand, five hundred seventy-five".