720236643 has 12 divisors (see below), whose sum is σ = 1117101960. Its totient is φ = 411563712.

The previous prime is 720236641. The next prime is 720236687. The reversal of 720236643 is 346632027.

It is not a de Polignac number, because 720236643 - 2¹ = 720236641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720236641) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2449638 + ... + 2449931.

It is an arithmetic number, because the mean of its divisors is an integer number (93091830).

Almost surely, 2^720236643 is an apocalyptic number.

720236643 is a deficient number, since it is larger than the sum of its proper divisors (396865317).

720236643 is a wasteful number, since it uses less digits than its factorization.

720236643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4899586 (or 4899579 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 33.

The square root of 720236643 is about 26837.2249496851. The cubic root of 720236643 is about 896.3791323578.

The spelling of 720236643 in words is "seven hundred twenty million, two hundred thirty-six thousand, six hundred forty-three".