695687538 has 64 divisors (see below), whose sum is σ = 1715696640. Its totient is φ = 183131712.

The previous prime is 695687537. The next prime is 695687543. The reversal of 695687538 is 835786596.

It is not an unprimeable number, because it can be changed into a prime (695687533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 428893 + ... + 430511.

It is an arithmetic number, because the mean of its divisors is an integer number (26807760).

Almost surely, 2^695687538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 695687538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (857848320).

695687538 is an abundant number, since it is smaller than the sum of its proper divisors (1020009102).

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

695687538 is a wasteful number, since it uses less digits than its factorization.

695687538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431.

The product of its digits is 10886400, while the sum is 57.

The square root of 695687538 is about 26375.8893309780. The cubic root of 695687538 is about 886.0768862885.

The spelling of 695687538 in words is "six hundred ninety-five million, six hundred eighty-seven thousand, five hundred thirty-eight".