30734920 has 16 divisors (see below), whose sum is σ = 69153660. Its totient is φ = 12293952.

The previous prime is 30734909. The next prime is 30734927. The reversal of 30734920 is 2943703.

It can be written as a sum of positive squares in 2 ways, for example, as 28879876 + 1855044 = 5374^2 + 1362^2 .

It is a super-3 number, since 3×30734920³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (30734927) 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 3 ways as a sum of consecutive naturals, for example, 384147 + ... + 384226.

Almost surely, 2^30734920 is an apocalyptic number.

It is an amenable number.

30734920 is an abundant number, since it is smaller than the sum of its proper divisors (38418740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30734920 is a wasteful number, since it uses less digits than its factorization.

30734920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768384 (or 768380 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 30734920 is about 5543.9083686511. The cubic root of 30734920 is about 313.2401060606.

The spelling of 30734920 in words is "thirty million, seven hundred thirty-four thousand, nine hundred twenty".