687303620 has 24 divisors (see below), whose sum is σ = 1443922200. Its totient is φ = 274810112.

The previous prime is 687303559. The next prime is 687303637. The reversal of 687303620 is 26303786.

It can be written as a sum of positive squares in 4 ways, for example, as 251412736 + 435890884 = 15856^2 + 20878^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58826 + ... + 69534.

It is an arithmetic number, because the mean of its divisors is an integer number (60163425).

Almost surely, 2^687303620 is an apocalyptic number.

It is an amenable number.

687303620 is an abundant number, since it is smaller than the sum of its proper divisors (756618580).

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

687303620 is a wasteful number, since it uses less digits than its factorization.

687303620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13927 (or 13925 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 687303620 is about 26216.4761171291. The cubic root of 687303620 is about 882.5030407009.

The spelling of 687303620 in words is "six hundred eighty-seven million, three hundred three thousand, six hundred twenty".