707640 has 32 divisors (see below), whose sum is σ = 2123280. Its totient is φ = 188672.

The previous prime is 707633. The next prime is 707647. The reversal of 707640 is 46707.

It is an interprime number because it is at equal distance from previous prime (707633) and next prime (707647).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 707640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (707647) by changing a digit.

707640 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2829 + ... + 3068.

2⁷⁰⁷⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

707640 is an abundant number, since it is smaller than the sum of its proper divisors (1415640).

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

707640 is a wasteful number, since it uses less digits than its factorization.

707640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5911 (or 5907 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 707640 is about 841.2134093082. The cubic root of 707640 is about 89.1122599744.

The spelling of 707640 in words is "seven hundred seven thousand, six hundred forty".