30129237 has 12 divisors (see below), whose sum is σ = 43612140. Its totient is φ = 20043648.

The previous prime is 30129199. The next prime is 30129299. The reversal of 30129237 is 73292103.

It can be written as a sum of positive squares in 2 ways, for example, as 27941796 + 2187441 = 5286^2 + 1479^2 .

It is not a de Polignac number, because 30129237 - 2⁷ = 30129109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30129237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30125237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1293 + ... + 7869.

It is an arithmetic number, because the mean of its divisors is an integer number (3634345).

Almost surely, 2^30129237 is an apocalyptic number.

It is an amenable number.

30129237 is a deficient number, since it is larger than the sum of its proper divisors (13482903).

30129237 is a wasteful number, since it uses less digits than its factorization.

30129237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7092 (or 7089 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 30129237 is about 5489.0105665776. The cubic root of 30129237 is about 311.1687996434.

The spelling of 30129237 in words is "thirty million, one hundred twenty-nine thousand, two hundred thirty-seven".