687776142 has 16 divisors (see below), whose sum is σ = 1407542400. Its totient is φ = 223927032.

The previous prime is 687776087. The next prime is 687776161. The reversal of 687776142 is 241677786.

It is a junction number, because it is equal to n+sod(n) for n = 687776091 and 687776100.

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, 1332642 + ... + 1333157.

It is an arithmetic number, because the mean of its divisors is an integer number (87971400).

Almost surely, 2^687776142 is an apocalyptic number.

687776142 is an abundant number, since it is smaller than the sum of its proper divisors (719766258).

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

687776142 is a wasteful number, since it uses less digits than its factorization.

687776142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665847.

The product of its digits is 790272, while the sum is 48.

The square root of 687776142 is about 26225.4864969175. The cubic root of 687776142 is about 882.7052349777.

The spelling of 687776142 in words is "six hundred eighty-seven million, seven hundred seventy-six thousand, one hundred forty-two".