30738729 has 24 divisors (see below), whose sum is σ = 48403488. Its totient is φ = 17297280.

The previous prime is 30738707. The next prime is 30738733. The reversal of 30738729 is 92783703.

It is not a de Polignac number, because 30738729 - 2⁹ = 30738217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30738739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8289 + ... + 11409.

It is an arithmetic number, because the mean of its divisors is an integer number (2016812).

Almost surely, 2^30738729 is an apocalyptic number.

It is an amenable number.

30738729 is a deficient number, since it is larger than the sum of its proper divisors (17664759).

30738729 is a wasteful number, since it uses less digits than its factorization.

30738729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3205 (or 3198 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 30738729 is about 5544.2518882172. The cubic root of 30738729 is about 313.2530455474.

The spelling of 30738729 in words is "thirty million, seven hundred thirty-eight thousand, seven hundred twenty-nine".