707952640 has 128 divisors (see below), whose sum is σ = 1769445000. Its totient is φ = 271581184.

The previous prime is 707952599. The next prime is 707952647. The reversal of 707952640 is 46259707.

It can be written as a sum of positive squares in 4 ways, for example, as 435306496 + 272646144 = 20864^2 + 16512^2 .

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 707952593 and 707952602.

It is not an unprimeable number, because it can be changed into a prime (707952647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4751286 + ... + 4751434.

Almost surely, 2^707952640 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 707952640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (884722500).

707952640 is an abundant number, since it is smaller than the sum of its proper divisors (1061492360).

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

707952640 is an equidigital number, since it uses as much as digits as its factorization.

707952640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 707952640 is about 26607.3794275197. The cubic root of 707952640 is about 891.2538150275.

The spelling of 707952640 in words is "seven hundred seven million, nine hundred fifty-two thousand, six hundred forty".