30120836 has 6 divisors (see below), whose sum is σ = 52711470. Its totient is φ = 15060416.

The previous prime is 30120829. The next prime is 30120847. The reversal of 30120836 is 63802103.

It can be written as a sum of positive squares in only one way, i.e., 28558336 + 1562500 = 5344^2 + 1250^2 .

It is a super-2 number, since 2×30120836² = 1814529522677792, which contains 22 as substring.

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, 3765101 + ... + 3765108.

It is an arithmetic number, because the mean of its divisors is an integer number (8785245).

Almost surely, 2^30120836 is an apocalyptic number.

It is an amenable number.

30120836 is a deficient number, since it is larger than the sum of its proper divisors (22590634).

30120836 is a wasteful number, since it uses less digits than its factorization.

30120836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7530213 (or 7530211 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30120836 is about 5488.2452569104. The cubic root of 30120836 is about 311.1398756662.

Adding to 30120836 its reverse (63802103), we get a palindrome (93922939).

The spelling of 30120836 in words is "thirty million, one hundred twenty thousand, eight hundred thirty-six".