700643844 has 72 divisors (see below), whose sum is σ = 1853211360. Its totient is φ = 231444864.

The previous prime is 700643843. The next prime is 700643851. The reversal of 700643844 is 448346007.

700643844 is a `hidden beast` number, since 7 + 0 + 0 + 643 + 8 + 4 + 4 = 666.

It is a super-2 number, since 2×700643844² = 981803592270192672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 700643799 and 700643808.

It is not an unprimeable number, because it can be changed into a prime (700643843) by changing a digit.

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, 106647 + ... + 113025.

Almost surely, 2^700643844 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 700643844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (926605680).

700643844 is an abundant number, since it is smaller than the sum of its proper divisors (1152567516).

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

700643844 is a wasteful number, since it uses less digits than its factorization.

700643844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6511 (or 6497 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 700643844 is about 26469.6778219910. The cubic root of 700643844 is about 888.1761429252.

The spelling of 700643844 in words is "seven hundred million, six hundred forty-three thousand, eight hundred forty-four".