30138453 has 32 divisors (see below), whose sum is σ = 47020800. Its totient is φ = 19051200.

The previous prime is 30138413. The next prime is 30138469. The reversal of 30138453 is 35483103.

It is a happy number.

It is not a de Polignac number, because 30138453 - 2⁸ = 30138197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30138413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47448 + ... + 48078.

It is an arithmetic number, because the mean of its divisors is an integer number (1469400).

Almost surely, 2^30138453 is an apocalyptic number.

It is an amenable number.

30138453 is a deficient number, since it is larger than the sum of its proper divisors (16882347).

30138453 is a wasteful number, since it uses less digits than its factorization.

30138453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 30138453 is about 5489.8499979508. The cubic root of 30138453 is about 311.2005234173.

The spelling of 30138453 in words is "thirty million, one hundred thirty-eight thousand, four hundred fifty-three".