30780072 has 48 divisors (see below), whose sum is σ = 86991840. Its totient is φ = 9813408.

The previous prime is 30780037. The next prime is 30780077. The reversal of 30780072 is 27008703.

It is not an unprimeable number, because it can be changed into a prime (30780077) 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 11 ways as a sum of consecutive naturals, for example, 7638 + ... + 10949.

It is an arithmetic number, because the mean of its divisors is an integer number (1812330).

Almost surely, 2^30780072 is an apocalyptic number.

It is an amenable number.

30780072 is an abundant number, since it is smaller than the sum of its proper divisors (56211768).

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

30780072 is a wasteful number, since it uses less digits than its factorization.

30780072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18622 (or 18615 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 30780072 is about 5547.9790915251. The cubic root of 30780072 is about 313.3934224077.

Adding to 30780072 its reverse (27008703), we get a palindrome (57788775).

The spelling of 30780072 in words is "thirty million, seven hundred eighty thousand, seventy-two".