30302140 has 24 divisors (see below), whose sum is σ = 69419952. Its totient is φ = 11018880.

The previous prime is 30302137. The next prime is 30302171. The reversal of 30302140 is 4120303.

30302140 = T₄₁₁ + T₄₁₂ + ... + T₆₃₀.

It is a self number, because there is not a number n which added to its sum of digits gives 30302140.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68649 + ... + 69088.

It is an arithmetic number, because the mean of its divisors is an integer number (2892498).

Almost surely, 2^30302140 is an apocalyptic number.

It is an amenable number.

30302140 is an abundant number, since it is smaller than the sum of its proper divisors (39117812).

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

30302140 is a wasteful number, since it uses less digits than its factorization.

30302140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137757 (or 137755 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 30302140 is about 5504.7379592493. The cubic root of 30302140 is about 311.7629006241.

Adding to 30302140 its reverse (4120303), we get a palindrome (34422443).

The spelling of 30302140 in words is "thirty million, three hundred two thousand, one hundred forty".