698787648 has 140 divisors (see below), whose sum is σ = 2230981060. Its totient is φ = 214990848.

The previous prime is 698787631. The next prime is 698787659. The reversal of 698787648 is 846787896.

It can be written as a sum of positive squares in 2 ways, for example, as 67371264 + 631416384 = 8208^2 + 25128^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 62208 + ... + 72576.

It is an arithmetic number, because the mean of its divisors is an integer number (15935579).

Almost surely, 2^698787648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 698787648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1115490530).

698787648 is an abundant number, since it is smaller than the sum of its proper divisors (1532193412).

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

698787648 is a wasteful number, since it uses less digits than its factorization.

698787648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10406 (or 10387 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The square root of 698787648 is about 26434.5918826072. The cubic root of 698787648 is about 887.3911092483.

The spelling of 698787648 in words is "six hundred ninety-eight million, seven hundred eighty-seven thousand, six hundred forty-eight".