688942996 has 24 divisors (see below), whose sum is σ = 1388742656. Its totient is φ = 292934880.

The previous prime is 688942987. The next prime is 688942999. The reversal of 688942996 is 699249886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688942999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93315 + ... + 100426.

Almost surely, 2^688942996 is an apocalyptic number.

It is an amenable number.

688942996 is an abundant number, since it is smaller than the sum of its proper divisors (699799660).

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

688942996 is a wasteful number, since it uses less digits than its factorization.

688942996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193879 (or 193877 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 61.

The square root of 688942996 is about 26247.7236346316. The cubic root of 688942996 is about 883.2041406247.

The spelling of 688942996 in words is "six hundred eighty-eight million, nine hundred forty-two thousand, nine hundred ninety-six".