688342844 has 12 divisors (see below), whose sum is σ = 1376685744. Its totient is φ = 295004064.

The previous prime is 688342843. The next prime is 688342847. The reversal of 688342844 is 448243886.

688342844 is an admirable number.

It is a super-3 number, since 3×688342844³ (a number of 27 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688342841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12291809 + ... + 12291864.

It is an arithmetic number, because the mean of its divisors is an integer number (114723812).

Almost surely, 2^688342844 is an apocalyptic number.

It is an amenable number.

688342844 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

688342844 is a wasteful number, since it uses less digits than its factorization.

688342844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24583684 (or 24583682 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 47.

The square root of 688342844 is about 26236.2886857116. The cubic root of 688342844 is about 882.9476071992.

The spelling of 688342844 in words is "six hundred eighty-eight million, three hundred forty-two thousand, eight hundred forty-four".