720706984 has 16 divisors (see below), whose sum is σ = 1358877600. Its totient is φ = 358339632.

The previous prime is 720706949. The next prime is 720706991. The reversal of 720706984 is 489607027.

It is a self number, because there is not a number n which added to its sum of digits gives 720706984.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250212 + ... + 253075.

It is an arithmetic number, because the mean of its divisors is an integer number (84929850).

Almost surely, 2^720706984 is an apocalyptic number.

It is an amenable number.

720706984 is a deficient number, since it is larger than the sum of its proper divisors (638170616).

720706984 is a wasteful number, since it uses less digits than its factorization.

720706984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503472 (or 503468 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 720706984 is about 26845.9863666806. The cubic root of 720706984 is about 896.5742127389.

Adding to 720706984 its sum of digits (43), we get a palindrome (720707027).

The spelling of 720706984 in words is "seven hundred twenty million, seven hundred six thousand, nine hundred eighty-four".