30302138 has 16 divisors (see below), whose sum is σ = 46236960. Its totient is φ = 14891856.

The previous prime is 30302137. The next prime is 30302171. The reversal of 30302138 is 83120303.

It is a super-3 number, since 3×30302138³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (30302137) 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 7 ways as a sum of consecutive naturals, for example, 45653 + ... + 46311.

It is an arithmetic number, because the mean of its divisors is an integer number (2889810).

Almost surely, 2^30302138 is an apocalyptic number.

30302138 is a deficient number, since it is larger than the sum of its proper divisors (15934822).

30302138 is a wasteful number, since it uses less digits than its factorization.

30302138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 30302138 is about 5504.7377775876. The cubic root of 30302138 is about 311.7628937651.

The spelling of 30302138 in words is "thirty million, three hundred two thousand, one hundred thirty-eight".