720540352 has 28 divisors (see below), whose sum is σ = 1634083600. Its totient is φ = 308802816.

The previous prime is 720540323. The next prime is 720540377. The reversal of 720540352 is 253045027.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 720540352.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 803727 + ... + 804622.

Almost surely, 2^720540352 is an apocalyptic number.

It is an amenable number.

720540352 is an abundant number, since it is smaller than the sum of its proper divisors (913543248).

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

720540352 is a wasteful number, since it uses less digits than its factorization.

720540352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608368 (or 1608358 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 720540352 is about 26842.8827065947. The cubic root of 720540352 is about 896.5051095421.

Adding to 720540352 its reverse (253045027), we get a palindrome (973585379).

The spelling of 720540352 in words is "seven hundred twenty million, five hundred forty thousand, three hundred fifty-two".