687027636 has 24 divisors (see below), whose sum is σ = 1781183040. Its totient is φ = 229009176.

The previous prime is 687027599. The next prime is 687027659. The reversal of 687027636 is 636720786.

687027636 is a `hidden beast` number, since 6 + 8 + 7 + 0 + 2 + 7 + 636 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 687027591 and 687027600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3180576 + ... + 3180791.

It is an arithmetic number, because the mean of its divisors is an integer number (74215960).

Almost surely, 2^687027636 is an apocalyptic number.

It is an amenable number.

687027636 is an abundant number, since it is smaller than the sum of its proper divisors (1094155404).

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

687027636 is a wasteful number, since it uses less digits than its factorization.

687027636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6361380 (or 6361372 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 687027636 is about 26211.2120284431. The cubic root of 687027636 is about 882.3849030399.

The spelling of 687027636 in words is "six hundred eighty-seven million, twenty-seven thousand, six hundred thirty-six".