30115072 has 36 divisors (see below), whose sum is σ = 64743700. Its totient is φ = 13897728.

The previous prime is 30115061. The next prime is 30115081. The reversal of 30115072 is 27051103.

It can be written as a sum of positive squares in 2 ways, for example, as 14622976 + 15492096 = 3824^2 + 3936^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1197 + ... + 7852.

Almost surely, 2^30115072 is an apocalyptic number.

30115072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30115072 is an abundant number, since it is smaller than the sum of its proper divisors (34628628).

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

30115072 is an equidigital number, since it uses as much as digits as its factorization.

30115072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9078 (or 9064 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 30115072 is about 5487.7201094808. The cubic root of 30115072 is about 311.1200275600.

Adding to 30115072 its reverse (27051103), we get a palindrome (57166175).

The spelling of 30115072 in words is "thirty million, one hundred fifteen thousand, seventy-two".