30315280 has 20 divisors (see below), whose sum is σ = 70483212. Its totient is φ = 12126080.

The previous prime is 30315253. The next prime is 30315293. The reversal of 30315280 is 8251303.

It can be written as a sum of positive squares in 2 ways, for example, as 13307904 + 17007376 = 3648^2 + 4124^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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 in 3 ways as a sum of consecutive naturals, for example, 189391 + ... + 189550.

Almost surely, 2^30315280 is an apocalyptic number.

It is an amenable number.

30315280 is an abundant number, since it is smaller than the sum of its proper divisors (40167932).

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

30315280 is a wasteful number, since it uses less digits than its factorization.

30315280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378954 (or 378948 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 30315280 is about 5505.9313471928. The cubic root of 30315280 is about 311.8079576456.

Adding to 30315280 its reverse (8251303), we get a palindrome (38566583).

The spelling of 30315280 in words is "thirty million, three hundred fifteen thousand, two hundred eighty".