30021416 has 8 divisors (see below), whose sum is σ = 56290170. Its totient is φ = 15010704.

The previous prime is 30021377. The next prime is 30021437. The reversal of 30021416 is 61412003.

It can be written as a sum of positive squares in only one way, i.e., 16728100 + 13293316 = 4090^2 + 3646^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 30021394 and 30021403.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1876331 + ... + 1876346.

Almost surely, 2^30021416 is an apocalyptic number.

It is an amenable number.

30021416 is a deficient number, since it is larger than the sum of its proper divisors (26268754).

30021416 is a wasteful number, since it uses less digits than its factorization.

30021416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3752683 (or 3752679 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 30021416 is about 5479.1802306549. The cubic root of 30021416 is about 310.7971713320.

Adding to 30021416 its reverse (61412003), we get a palindrome (91433419).

The spelling of 30021416 in words is "thirty million, twenty-one thousand, four hundred sixteen".