30727940 has 24 divisors (see below), whose sum is σ = 67925760. Its totient is φ = 11644128.

The previous prime is 30727927. The next prime is 30727973. The reversal of 30727940 is 4972703.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30727897 and 30727906.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 40052 + ... + 40811.

It is an arithmetic number, because the mean of its divisors is an integer number (2830240).

Almost surely, 2^30727940 is an apocalyptic number.

It is an amenable number.

30727940 is an abundant number, since it is smaller than the sum of its proper divisors (37197820).

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

30727940 is a wasteful number, since it uses less digits than its factorization.

30727940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80891 (or 80889 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 30727940 is about 5543.2788131213. The cubic root of 30727940 is about 313.2163916506.

The spelling of 30727940 in words is "thirty million, seven hundred twenty-seven thousand, nine hundred forty".