689531898 has 32 divisors (see below), whose sum is σ = 1556314560. Its totient is φ = 201743360.

The previous prime is 689531897. The next prime is 689531923. The reversal of 689531898 is 898135986.

It is not an unprimeable number, because it can be changed into a prime (689531897) 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 15 ways as a sum of consecutive naturals, for example, 178215 + ... + 182042.

It is an arithmetic number, because the mean of its divisors is an integer number (48634830).

Almost surely, 2^689531898 is an apocalyptic number.

689531898 is an abundant number, since it is smaller than the sum of its proper divisors (866782662).

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

689531898 is a wasteful number, since it uses less digits than its factorization.

689531898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360302.

The product of its digits is 3732480, while the sum is 57.

The square root of 689531898 is about 26258.9393921384. The cubic root of 689531898 is about 883.4557204894.

The spelling of 689531898 in words is "six hundred eighty-nine million, five hundred thirty-one thousand, eight hundred ninety-eight".