698285664 has 216 divisors, whose sum is σ = 2179555560. Its totient is φ = 217486080.

The previous prime is 698285641. The next prime is 698285671. The reversal of 698285664 is 466582896.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a tau number, because it is divible by the number of its divisors (216).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 698285664.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 22525329 + ... + 22525359.

It is an arithmetic number, because the mean of its divisors is an integer number (10090535).

Almost surely, 2^698285664 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 698285664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089777780).

698285664 is an abundant number, since it is smaller than the sum of its proper divisors (1481269896).

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

698285664 is a wasteful number, since it uses less digits than its factorization.

698285664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 65 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 698285664 is about 26425.0953451449. The cubic root of 698285664 is about 887.1785683574.

Multiplying 698285664 by its sum of digits (54), we get a square (37707425856 = 194184²).

698285664 divided by its sum of digits (54) gives a square (12931216 = 3596²).

The spelling of 698285664 in words is "six hundred ninety-eight million, two hundred eighty-five thousand, six hundred sixty-four".