30345140 has 24 divisors (see below), whose sum is σ = 72828672. Its totient is φ = 10404000.

The previous prime is 30345103. The next prime is 30345149. The reversal of 30345140 is 4154303.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30345149) 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, 108236 + ... + 108515.

It is an arithmetic number, because the mean of its divisors is an integer number (3034528).

Almost surely, 2^30345140 is an apocalyptic number.

It is an amenable number.

30345140 is an abundant number, since it is smaller than the sum of its proper divisors (42483532).

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

30345140 is a wasteful number, since it uses less digits than its factorization.

30345140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216767 (or 216765 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 30345140 is about 5508.6423009667. The cubic root of 30345140 is about 311.9102991091.

Adding to 30345140 its reverse (4154303), we get a palindrome (34499443).

The spelling of 30345140 in words is "thirty million, three hundred forty-five thousand, one hundred forty".