688871880 has 48 divisors (see below), whose sum is σ = 2238834780. Its totient is φ = 183699072.

The previous prime is 688871879. The next prime is 688871917. The reversal of 688871880 is 88178886.

It can be written as a sum of positive squares in 2 ways, for example, as 570540996 + 118330884 = 23886^2 + 10878^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 956407 + ... + 957126.

Almost surely, 2^688871880 is an apocalyptic number.

688871880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

688871880 is an abundant number, since it is smaller than the sum of its proper divisors (1549962900).

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

688871880 is a wasteful number, since it uses less digits than its factorization.

688871880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913550 (or 1913543 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 54.

The square root of 688871880 is about 26246.3688917153. The cubic root of 688871880 is about 883.1737500567.

The spelling of 688871880 in words is "six hundred eighty-eight million, eight hundred seventy-one thousand, eight hundred eighty".