687258385 has 16 divisors (see below), whose sum is σ = 930709440. Its totient is φ = 482587840.

The previous prime is 687258361. The next prime is 687258401. The reversal of 687258385 is 583852786.

It is not a de Polignac number, because 687258385 - 2¹¹ = 687256337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213847 + ... + 217036.

It is an arithmetic number, because the mean of its divisors is an integer number (58169340).

Almost surely, 2^687258385 is an apocalyptic number.

It is an amenable number.

687258385 is a deficient number, since it is larger than the sum of its proper divisors (243451055).

687258385 is a wasteful number, since it uses less digits than its factorization.

687258385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430928.

The product of its digits is 3225600, while the sum is 52.

The square root of 687258385 is about 26215.6133821049. The cubic root of 687258385 is about 882.4836795822.

The spelling of 687258385 in words is "six hundred eighty-seven million, two hundred fifty-eight thousand, three hundred eighty-five".