687040002 has 32 divisors (see below), whose sum is σ = 1665552960. Its totient is φ = 208193760.

The previous prime is 687039959. The next prime is 687040009. The reversal of 687040002 is 200040786.

It is a super-3 number, since 3×687040002³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (687040009) by changing a digit.

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, 577723 + ... + 578910.

It is an arithmetic number, because the mean of its divisors is an integer number (52048530).

Almost surely, 2^687040002 is an apocalyptic number.

687040002 is an abundant number, since it is smaller than the sum of its proper divisors (978512958).

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

687040002 is a wasteful number, since it uses less digits than its factorization.

687040002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156655 (or 1156649 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 687040002 is about 26211.4479188007. The cubic root of 687040002 is about 882.3901971046.

Adding to 687040002 its reverse (200040786), we get a palindrome (887080788).

The spelling of 687040002 in words is "six hundred eighty-seven million, forty thousand, two".