30136240 has 40 divisors (see below), whose sum is σ = 74191680. Its totient is φ = 11344896.

The previous prime is 30136237. The next prime is 30136243. The reversal of 30136240 is 4263103.

It is an interprime number because it is at equal distance from previous prime (30136237) and next prime (30136243).

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×30136240² = 1816385922675200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30136243) 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, 9720 + ... + 12439.

It is an arithmetic number, because the mean of its divisors is an integer number (1854792).

Almost surely, 2^30136240 is an apocalyptic number.

It is an amenable number.

30136240 is an abundant number, since it is smaller than the sum of its proper divisors (44055440).

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

30136240 is a wasteful number, since it uses less digits than its factorization.

30136240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22189 (or 22183 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 30136240 is about 5489.6484404741. The cubic root of 30136240 is about 311.1929063087.

Adding to 30136240 its reverse (4263103), we get a palindrome (34399343).

The spelling of 30136240 in words is "thirty million, one hundred thirty-six thousand, two hundred forty".