709638 has 8 divisors (see below), whose sum is σ = 1419288. Its totient is φ = 236544.

The previous prime is 709609. The next prime is 709649. The reversal of 709638 is 836907.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

709638 is an admirable number.

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

It is a junction number, because it is equal to n+sod(n) for n = 709599 and 709608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59131 + ... + 59142.

It is an arithmetic number, because the mean of its divisors is an integer number (177411).

2⁷⁰⁹⁶³⁸ is an apocalyptic number.

709638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

709638 is a wasteful number, since it uses less digits than its factorization.

709638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118278.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 709638 is about 842.4001424501. The cubic root of 709638 is about 89.1960497490.

The spelling of 709638 in words is "seven hundred nine thousand, six hundred thirty-eight".