720659898 has 24 divisors (see below), whose sum is σ = 1784491488. Its totient is φ = 205902792.

The previous prime is 720659887. The next prime is 720659959. The reversal of 720659898 is 898956027.

It is a happy number.

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 11 ways as a sum of consecutive naturals, for example, 2859636 + ... + 2859887.

It is an arithmetic number, because the mean of its divisors is an integer number (74353812).

Almost surely, 2^720659898 is an apocalyptic number.

720659898 is an abundant number, since it is smaller than the sum of its proper divisors (1063831590).

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

720659898 is a wasteful number, since it uses less digits than its factorization.

720659898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5719538 (or 5719535 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The square root of 720659898 is about 26845.1093870001. The cubic root of 720659898 is about 896.5546869983.

The spelling of 720659898 in words is "seven hundred twenty million, six hundred fifty-nine thousand, eight hundred ninety-eight".