707630640 has 80 divisors (see below), whose sum is σ = 2205165408. Its totient is φ = 187711488.

The previous prime is 707630629. The next prime is 707630641. The reversal of 707630640 is 46036707.

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

It is a super-2 number, since 2×707630640² = 1001482245333619200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (707630641) 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 15 ways as a sum of consecutive naturals, for example, 38682 + ... + 53958.

Almost surely, 2^707630640 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 707630640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1102582704).

707630640 is an abundant number, since it is smaller than the sum of its proper divisors (1497534768).

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

707630640 is a wasteful number, since it uses less digits than its factorization.

707630640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15486 (or 15480 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 33.

The square root of 707630640 is about 26601.3277864095. The cubic root of 707630640 is about 891.1186707475.

The spelling of 707630640 in words is "seven hundred seven million, six hundred thirty thousand, six hundred forty".