687435678238 has 8 divisors (see below), whose sum is σ = 1031157056160. Its totient is φ = 343716659520.

The previous prime is 687435678199. The next prime is 687435678271. The reversal of 687435678238 is 832876534786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723723 + ... + 1377913.

It is an arithmetic number, because the mean of its divisors is an integer number (128894632020).

Almost surely, 2^687435678238 is an apocalyptic number.

687435678238 is a deficient number, since it is larger than the sum of its proper divisors (343721377922).

687435678238 is a wasteful number, since it uses less digits than its factorization.

687435678238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179602.

The product of its digits is 325140480, while the sum is 67.

The spelling of 687435678238 in words is "six hundred eighty-seven billion, four hundred thirty-five million, six hundred seventy-eight thousand, two hundred thirty-eight".