699785856 has 480 divisors, whose sum is σ = 2674170720. Its totient is φ = 173859840.

The previous prime is 699785837. The next prime is 699785881. The reversal of 699785856 is 658587996.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 699785793 and 699785802.

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 59 ways as a sum of consecutive naturals, for example, 30425461 + ... + 30425483.

It is an arithmetic number, because the mean of its divisors is an integer number (5571189).

Almost surely, 2^699785856 is an apocalyptic number.

699785856 is a gapful number since it is divisible by the number (66) 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 699785856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1337085360).

699785856 is an abundant number, since it is smaller than the sum of its proper divisors (1974384864).

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

699785856 is a wasteful number, since it uses less digits than its factorization.

699785856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 46 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 63.

The square root of 699785856 is about 26453.4658598831. The cubic root of 699785856 is about 887.8134499774.

The spelling of 699785856 in words is "six hundred ninety-nine million, seven hundred eighty-five thousand, eight hundred fifty-six".