688895956 has 24 divisors (see below), whose sum is σ = 1393277760. Its totient is φ = 291922752.

The previous prime is 688895951. The next prime is 688895983. The reversal of 688895956 is 659598886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688895951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135730 + ... + 140713.

It is an arithmetic number, because the mean of its divisors is an integer number (58053240).

Almost surely, 2^688895956 is an apocalyptic number.

It is an amenable number.

688895956 is an abundant number, since it is smaller than the sum of its proper divisors (704381804).

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

688895956 is a wasteful number, since it uses less digits than its factorization.

688895956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276543 (or 276541 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 64.

The square root of 688895956 is about 26246.8275416287. The cubic root of 688895956 is about 883.1840388802.

The spelling of 688895956 in words is "six hundred eighty-eight million, eight hundred ninety-five thousand, nine hundred fifty-six".