698531680 has 288 divisors, whose sum is σ = 2162039040. Its totient is φ = 207129600.

The previous prime is 698531653. The next prime is 698531737. The reversal of 698531680 is 86135896.

698531680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 698531680.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11839491 + ... + 11839549.

It is an arithmetic number, because the mean of its divisors is an integer number (7507080).

Almost surely, 2^698531680 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 698531680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1081019520).

698531680 is an abundant number, since it is smaller than the sum of its proper divisors (1463507360).

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

698531680 is a wasteful number, since it uses less digits than its factorization.

698531680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 698531680 is about 26429.7499042272. The cubic root of 698531680 is about 887.2827446790.

The spelling of 698531680 in words is "six hundred ninety-eight million, five hundred thirty-one thousand, six hundred eighty".