688147872 has 48 divisors (see below), whose sum is σ = 1807831872. Its totient is φ = 229199360.

The previous prime is 688147853. The next prime is 688147903. The reversal of 688147872 is 278741886.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175372 + ... + 179252.

It is an arithmetic number, because the mean of its divisors is an integer number (37663164).

Almost surely, 2^688147872 is an apocalyptic number.

It is an amenable number.

688147872 is an abundant number, since it is smaller than the sum of its proper divisors (1119684000).

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

688147872 is a wasteful number, since it uses less digits than its factorization.

688147872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5741 (or 5733 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 51.

The square root of 688147872 is about 26232.5727293379. The cubic root of 688147872 is about 882.8642348319.

The spelling of 688147872 in words is "six hundred eighty-eight million, one hundred forty-seven thousand, eight hundred seventy-two".