720220642 has 16 divisors (see below), whose sum is σ = 1093502592. Its totient is φ = 355741120.

The previous prime is 720220639. The next prime is 720220673. The reversal of 720220642 is 246022027.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 65163 + ... + 75409.

It is an arithmetic number, because the mean of its divisors is an integer number (68343912).

Almost surely, 2^720220642 is an apocalyptic number.

720220642 is a deficient number, since it is larger than the sum of its proper divisors (373281950).

720220642 is a wasteful number, since it uses less digits than its factorization.

720220642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10673.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 720220642 is about 26836.9268359848. The cubic root of 720220642 is about 896.3724942299.

Adding to 720220642 its reverse (246022027), we get a palindrome (966242669).

The spelling of 720220642 in words is "seven hundred twenty million, two hundred twenty thousand, six hundred forty-two".