699780880 has 20 divisors (see below), whose sum is σ = 1626990732. Its totient is φ = 279912320.

The previous prime is 699780853. The next prime is 699780881. The reversal of 699780880 is 88087996.

699780880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 409010176 + 290770704 = 20224^2 + 17052^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (699780881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4373551 + ... + 4373710.

Almost surely, 2^699780880 is an apocalyptic number.

It is an amenable number.

699780880 is an abundant number, since it is smaller than the sum of its proper divisors (927209852).

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

699780880 is a wasteful number, since it uses less digits than its factorization.

699780880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8747274 (or 8747268 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 55.

The square root of 699780880 is about 26453.3718077677. The cubic root of 699780880 is about 887.8113456335.

The spelling of 699780880 in words is "six hundred ninety-nine million, seven hundred eighty thousand, eight hundred eighty".