688428361 has 8 divisors (see below), whose sum is σ = 715752000. Its totient is φ = 661343760.

The previous prime is 688428353. The next prime is 688428373. The reversal of 688428361 is 163824886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 688428361 - 2³ = 688428353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688428331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53875 + ... + 65416.

It is an arithmetic number, because the mean of its divisors is an integer number (89469000).

Almost surely, 2^688428361 is an apocalyptic number.

It is an amenable number.

688428361 is a deficient number, since it is larger than the sum of its proper divisors (27323639).

688428361 is a wasteful number, since it uses less digits than its factorization.

688428361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119519.

The product of its digits is 442368, while the sum is 46.

The square root of 688428361 is about 26237.9183816095. The cubic root of 688428361 is about 882.9841703278.

It can be divided in two parts, 6884 and 28361, that added together give a triangular number (35245 = T₂₆₅).

The spelling of 688428361 in words is "six hundred eighty-eight million, four hundred twenty-eight thousand, three hundred sixty-one".