30304140 has 48 divisors (see below), whose sum is σ = 85418592. Its totient is φ = 8027136.

The previous prime is 30304123. The next prime is 30304171. The reversal of 30304140 is 4140303.

It is a super-2 number, since 2×30304140² = 1836681802279200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7812 + ... + 11028.

It is an arithmetic number, because the mean of its divisors is an integer number (1779554).

Almost surely, 2^30304140 is an apocalyptic number.

30304140 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 30304140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42709296).

30304140 is an abundant number, since it is smaller than the sum of its proper divisors (55114452).

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

30304140 is a wasteful number, since it uses less digits than its factorization.

30304140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386 (or 3384 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 30304140 is about 5504.9196179418. The cubic root of 30304140 is about 311.7697594585.

Adding to 30304140 its reverse (4140303), we get a palindrome (34444443).

The spelling of 30304140 in words is "thirty million, three hundred four thousand, one hundred forty".