304340040 has 96 divisors (see below), whose sum is σ = 1010206080. Its totient is φ = 79426176.

The previous prime is 304340033. The next prime is 304340077. The reversal of 304340040 is 40043403.

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

It is a junction number, because it is equal to n+sod(n) for n = 304339995 and 304340022.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7927 + ... + 25913.

It is an arithmetic number, because the mean of its divisors is an integer number (10522980).

Almost surely, 2^304340040 is an apocalyptic number.

304340040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 304340040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505103040).

304340040 is an abundant number, since it is smaller than the sum of its proper divisors (705866040).

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

304340040 is a wasteful number, since it uses less digits than its factorization.

304340040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18051 (or 18044 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 304340040 is about 17445.3443646149. The cubic root of 304340040 is about 672.6456910389.

Adding to 304340040 its reverse (40043403), we get a palindrome (344383443).

The spelling of 304340040 in words is "three hundred four million, three hundred forty thousand, forty".