690349998 has 16 divisors (see below), whose sum is σ = 1486907856. Its totient is φ = 212415360.

The previous prime is 690349997. The next prime is 690350039. The reversal of 690349998 is 899943096.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690349997) 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 7 ways as a sum of consecutive naturals, for example, 4425243 + ... + 4425398.

It is an arithmetic number, because the mean of its divisors is an integer number (92931741).

Almost surely, 2^690349998 is an apocalyptic number.

690349998 is an abundant number, since it is smaller than the sum of its proper divisors (796557858).

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

690349998 is a wasteful number, since it uses less digits than its factorization.

690349998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8850659.

The product of its (nonzero) digits is 3779136, while the sum is 57.

The square root of 690349998 is about 26274.5123265875. The cubic root of 690349998 is about 883.8049764972.

The spelling of 690349998 in words is "six hundred ninety million, three hundred forty-nine thousand, nine hundred ninety-eight".