687253136 has 40 divisors (see below), whose sum is σ = 1421932800. Its totient is φ = 321068160.

The previous prime is 687253109. The next prime is 687253159. The reversal of 687253136 is 631352786.

It is a junction number, because it is equal to n+sod(n) for n = 687253093 and 687253102.

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, 9506 + ... + 38273.

It is an arithmetic number, because the mean of its divisors is an integer number (35548320).

Almost surely, 2^687253136 is an apocalyptic number.

It is an amenable number.

687253136 is an abundant number, since it is smaller than the sum of its proper divisors (734679664).

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

687253136 is a wasteful number, since it uses less digits than its factorization.

687253136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47847 (or 47841 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 687253136 is about 26215.5132698179. The cubic root of 687253136 is about 882.4814328927.

The spelling of 687253136 in words is "six hundred eighty-seven million, two hundred fifty-three thousand, one hundred thirty-six".