687027428 has 6 divisors (see below), whose sum is σ = 1202298006. Its totient is φ = 343513712.

The previous prime is 687027427. The next prime is 687027449. The reversal of 687027428 is 824720786.

687027428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 686335204 + 692224 = 26198^2 + 832^2 .

It is not an unprimeable number, because it can be changed into a prime (687027427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85878425 + ... + 85878432.

It is an arithmetic number, because the mean of its divisors is an integer number (200383001).

Almost surely, 2^687027428 is an apocalyptic number.

It is an amenable number.

687027428 is a deficient number, since it is larger than the sum of its proper divisors (515270578).

687027428 is a wasteful number, since it uses less digits than its factorization.

687027428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171756861 (or 171756859 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 44.

The square root of 687027428 is about 26211.2080606751. The cubic root of 687027428 is about 882.3848139915.

The spelling of 687027428 in words is "six hundred eighty-seven million, twenty-seven thousand, four hundred twenty-eight".