688369698 has 16 divisors (see below), whose sum is σ = 1529710560. Its totient is φ = 229456548.

The previous prime is 688369679. The next prime is 688369711. The reversal of 688369698 is 896963886.

It is a super-2 number, since 2×688369698² = 947705682249222408, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6373740 + ... + 6373847.

It is an arithmetic number, because the mean of its divisors is an integer number (95606910).

Almost surely, 2^688369698 is an apocalyptic number.

688369698 is an abundant number, since it is smaller than the sum of its proper divisors (841340862).

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

688369698 is a wasteful number, since it uses less digits than its factorization.

688369698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12747598 (or 12747592 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 63.

The square root of 688369698 is about 26236.8004527991. The cubic root of 688369698 is about 882.9590890583.

The spelling of 688369698 in words is "six hundred eighty-eight million, three hundred sixty-nine thousand, six hundred ninety-eight".