700784640 has 168 divisors, whose sum is σ = 2430516348. Its totient is φ = 186777600.

The previous prime is 700784627. The next prime is 700784641. The reversal of 700784640 is 46487007.

It is a happy number.

700784640 is a `hidden beast` number, since 7 + 0 + 0 + 7 + 8 + 4 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 632623104 + 68161536 = 25152^2 + 8256^2 .

It is a super-2 number, since 2×700784640² = 982198223319859200, 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 = 700784595 and 700784604.

It is not an unprimeable number, because it can be changed into a prime (700784641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 367690 + ... + 369590.

Almost surely, 2^700784640 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 700784640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1215258174).

700784640 is an abundant number, since it is smaller than the sum of its proper divisors (1729731708).

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

700784640 is a wasteful number, since it uses less digits than its factorization.

700784640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938 (or 1911 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 700784640 is about 26472.3372598643. The cubic root of 700784640 is about 888.2356326235.

The spelling of 700784640 in words is "seven hundred million, seven hundred eighty-four thousand, six hundred forty".