687055620 has 48 divisors (see below), whose sum is σ = 1924892928. Its totient is φ = 183106560.

The previous prime is 687055619. The next prime is 687055651. The reversal of 687055620 is 26550786.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199957 + ... + 203363.

It is an arithmetic number, because the mean of its divisors is an integer number (40101936).

Almost surely, 2^687055620 is an apocalyptic number.

687055620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

687055620 is an abundant number, since it is smaller than the sum of its proper divisors (1237837308).

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

687055620 is a wasteful number, since it uses less digits than its factorization.

687055620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6780 (or 6778 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 687055620 is about 26211.7458403671. The cubic root of 687055620 is about 882.3968833070.

The spelling of 687055620 in words is "six hundred eighty-seven million, fifty-five thousand, six hundred twenty".