309702 has 16 divisors (see below), whose sum is σ = 628992. Its totient is φ = 101640.

The previous prime is 309677. The next prime is 309707. The reversal of 309702 is 207903.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 309702.

It is not an unprimeable number, because it can be changed into a prime (309707) by changing a digit.

309702 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, 63 + ... + 789.

It is an arithmetic number, because the mean of its divisors is an integer number (39312).

2³⁰⁹⁷⁰² is an apocalyptic number.

309702 is an abundant number, since it is smaller than the sum of its proper divisors (319290).

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

309702 is a wasteful number, since it uses less digits than its factorization.

309702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803.

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 309702 is about 556.5087600389. The cubic root of 309702 is about 67.6573011809.

The spelling of 309702 in words is "three hundred nine thousand, seven hundred two".