687026420 has 18 divisors (see below), whose sum is σ = 1443001686. Its totient is φ = 274763680.

The previous prime is 687026419. The next prime is 687026429. The reversal of 687026420 is 24620786.

687026420 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 3 ways, for example, as 50069776 + 636956644 = 7076^2 + 25238^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687026429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114290 + ... + 120150.

Almost surely, 2^687026420 is an apocalyptic number.

It is an amenable number.

687026420 is an abundant number, since it is smaller than the sum of its proper divisors (755975266).

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

687026420 is an frugal number, since it uses more digits than its factorization.

687026420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11731 (or 5868 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 687026420 is about 26211.1888322525. The cubic root of 687026420 is about 882.3843824491.

The spelling of 687026420 in words is "six hundred eighty-seven million, twenty-six thousand, four hundred twenty".