688871000 has 32 divisors (see below), whose sum is σ = 1611960480. Its totient is φ = 275548000.

The previous prime is 688870927. The next prime is 688871003. The reversal of 688871000 is 178886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688871003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343436 + ... + 345435.

It is an arithmetic number, because the mean of its divisors is an integer number (50373765).

Almost surely, 2^688871000 is an apocalyptic number.

It is an amenable number.

688871000 is an abundant number, since it is smaller than the sum of its proper divisors (923089480).

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

688871000 is a wasteful number, since it uses less digits than its factorization.

688871000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688892 (or 688878 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 688871000 is about 26246.3521274862. The cubic root of 688871000 is about 883.1733739862.

The spelling of 688871000 in words is "six hundred eighty-eight million, eight hundred seventy-one thousand".