699223680 has 192 divisors, whose sum is σ = 2429523720. Its totient is φ = 185303040.

The previous prime is 699223673. The next prime is 699223703. The reversal of 699223680 is 86322996.

It can be written as a sum of positive squares in 4 ways, for example, as 386358336 + 312865344 = 19656^2 + 17688^2 .

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (45).

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 23 ways as a sum of consecutive naturals, for example, 1341820 + ... + 1342340.

Almost surely, 2^699223680 is an apocalyptic number.

699223680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 699223680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1214761860).

699223680 is an abundant number, since it is smaller than the sum of its proper divisors (1730300040).

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

699223680 is a wasteful number, since it uses less digits than its factorization.

699223680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 699223680 is about 26442.8379717458. The cubic root of 699223680 is about 887.5756433575.

The spelling of 699223680 in words is "six hundred ninety-nine million, two hundred twenty-three thousand, six hundred eighty".