699245840 has 80 divisors (see below), whose sum is σ = 1653644160. Its totient is φ = 274944000.

The previous prime is 699245821. The next prime is 699245861. The reversal of 699245840 is 48542996.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 1947581 + ... + 1947939.

It is an arithmetic number, because the mean of its divisors is an integer number (20670552).

Almost surely, 2^699245840 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 699245840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (826822080).

699245840 is an abundant number, since it is smaller than the sum of its proper divisors (954398320).

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

699245840 is a wasteful number, since it uses less digits than its factorization.

699245840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 699245840 is about 26443.2569854774. The cubic root of 699245840 is about 887.5850196935.

The spelling of 699245840 in words is "six hundred ninety-nine million, two hundred forty-five thousand, eight hundred forty".