30388137 has 16 divisors (see below), whose sum is σ = 44815680. Its totient is φ = 18194112.

The previous prime is 30388097. The next prime is 30388139. The reversal of 30388137 is 73188303.

It is a de Polignac number, because none of the positive numbers 2^k-30388137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30388098 and 30388107.

It is not an unprimeable number, because it can be changed into a prime (30388139) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9087 + ... + 11972.

It is an arithmetic number, because the mean of its divisors is an integer number (2800980).

Almost surely, 2^30388137 is an apocalyptic number.

30388137 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

30388137 is a deficient number, since it is larger than the sum of its proper divisors (14427543).

30388137 is a wasteful number, since it uses less digits than its factorization.

30388137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21112.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 30388137 is about 5512.5436052697. The cubic root of 30388137 is about 312.0575481453.

It can be divided in two parts, 3038 and 8137, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 30388137 in words is "thirty million, three hundred eighty-eight thousand, one hundred thirty-seven".