30772072 has 8 divisors (see below), whose sum is σ = 57697650. Its totient is φ = 15386032.

The previous prime is 30772067. The next prime is 30772081. The reversal of 30772072 is 27027703.

It can be written as a sum of positive squares in only one way, i.e., 29877156 + 894916 = 5466^2 + 946^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 30772072.

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 as a sum of consecutive naturals, namely, 1923247 + ... + 1923262.

Almost surely, 2^30772072 is an apocalyptic number.

It is an amenable number.

30772072 is a deficient number, since it is larger than the sum of its proper divisors (26925578).

30772072 is a wasteful number, since it uses less digits than its factorization.

30772072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3846515 (or 3846511 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 28.

The square root of 30772072 is about 5547.2580614210. The cubic root of 30772072 is about 313.3662688582.

Adding to 30772072 its reverse (27027703), we get a palindrome (57799775).

The spelling of 30772072 in words is "thirty million, seven hundred seventy-two thousand, seventy-two".