309930 has 16 divisors (see below), whose sum is σ = 743904. Its totient is φ = 82640.

The previous prime is 309929. The next prime is 309931. The reversal of 309930 is 39903.

309930 is nontrivially palindromic in base 13.

It is an interprime number because it is at equal distance from previous prime (309929) and next prime (309931).

It is a self number, because there is not a number n which added to its sum of digits gives 309930.

It is not an unprimeable number, because it can be changed into a prime (309931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5136 + ... + 5195.

It is an arithmetic number, because the mean of its divisors is an integer number (46494).

2³⁰⁹⁹³⁰ is an apocalyptic number.

309930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

309930 is an abundant number, since it is smaller than the sum of its proper divisors (433974).

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

309930 is a wasteful number, since it uses less digits than its factorization.

309930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10341.

The product of its (nonzero) digits is 729, while the sum is 24.

The square root of 309930 is about 556.7135708782. The cubic root of 309930 is about 67.6739000197.

The spelling of 309930 in words is "three hundred nine thousand, nine hundred thirty".