308430 has 48 divisors (see below), whose sum is σ = 842400. Its totient is φ = 78144.

The previous prime is 308423. The next prime is 308437. The reversal of 308430 is 34803.

It is an interprime number because it is at equal distance from previous prime (308423) and next prime (308437).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308437) by changing a digit.

308430 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 23 ways as a sum of consecutive naturals, for example, 1996 + ... + 2144.

It is an arithmetic number, because the mean of its divisors is an integer number (17550).

2³⁰⁸⁴³⁰ is an apocalyptic number.

308430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 308430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421200).

308430 is an abundant number, since it is smaller than the sum of its proper divisors (533970).

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

308430 is a wasteful number, since it uses less digits than its factorization.

308430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 308430 is about 555.3647450100. The cubic root of 308430 is about 67.5645473100.

The spelling of 308430 in words is "three hundred eight thousand, four hundred thirty".