680198988 has 36 divisors (see below), whose sum is σ = 1846255992. Its totient is φ = 194342400.

The previous prime is 680198969. The next prime is 680198999. The reversal of 680198988 is 889891086.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 577813 + ... + 578988.

Almost surely, 2^680198988 is an apocalyptic number.

It is an amenable number.

680198988 is an abundant number, since it is smaller than the sum of its proper divisors (1166057004).

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

680198988 is a wasteful number, since it uses less digits than its factorization.

680198988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156822 (or 1156813 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 57.

The square root of 680198988 is about 26080.6247624554. The cubic root of 680198988 is about 879.4517021782.

It can be divided in two parts, 680198 and 988, that added together give a palindrome (681186).

The spelling of 680198988 in words is "six hundred eighty million, one hundred ninety-eight thousand, nine hundred eighty-eight".