699648090 has 64 divisors (see below), whose sum is σ = 1781792640. Its totient is φ = 175216640.

The previous prime is 699648043. The next prime is 699648121. The reversal of 699648090 is 90846996.

699648090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 288985 + ... + 291395.

It is an arithmetic number, because the mean of its divisors is an integer number (27840510).

Almost surely, 2^699648090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 699648090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (890896320).

699648090 is an abundant number, since it is smaller than the sum of its proper divisors (1082144550).

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

699648090 is a wasteful number, since it uses less digits than its factorization.

699648090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007.

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 699648090 is about 26450.8618007051. The cubic root of 699648090 is about 887.7551852316.

The spelling of 699648090 in words is "six hundred ninety-nine million, six hundred forty-eight thousand, ninety".