30120736 has 36 divisors (see below), whose sum is σ = 63012978. Its totient is φ = 14170112.

The previous prime is 30120707. The next prime is 30120743. The reversal of 30120736 is 63702103.

It can be written as a sum of positive squares in 3 ways, for example, as 29811600 + 309136 = 5460^2 + 556^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7620 + ... + 10876.

Almost surely, 2^30120736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30120736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31506489).

30120736 is an abundant number, since it is smaller than the sum of its proper divisors (32892242).

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

30120736 is a wasteful number, since it uses less digits than its factorization.

30120736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3301 (or 3276 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 30120736 is about 5488.2361465229. The cubic root of 30120736 is about 311.1395313417.

Adding to 30120736 its reverse (63702103), we get a palindrome (93822839).

The spelling of 30120736 in words is "thirty million, one hundred twenty thousand, seven hundred thirty-six".