707638 has 4 divisors (see below), whose sum is σ = 1061460. Its totient is φ = 353818.

The previous prime is 707633. The next prime is 707647. The reversal of 707638 is 836707.

707638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (707633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176908 + ... + 176911.

It is an arithmetic number, because the mean of its divisors is an integer number (265365).

2⁷⁰⁷⁶³⁸ is an apocalyptic number.

707638 is a deficient number, since it is larger than the sum of its proper divisors (353822).

707638 is a wasteful number, since it uses less digits than its factorization.

707638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353821.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 707638 is about 841.2122205484. The cubic root of 707638 is about 89.1121760217.

The spelling of 707638 in words is "seven hundred seven thousand, six hundred thirty-eight".