30515428 has 12 divisors (see below), whose sum is σ = 53596732. Its totient is φ = 15202080.

The previous prime is 30515399. The next prime is 30515431. The reversal of 30515428 is 82451503.

It can be written as a sum of positive squares in 2 ways, for example, as 8538084 + 21977344 = 2922^2 + 4688^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30515396 and 30515405.

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, 12663 + ... + 14878.

Almost surely, 2^30515428 is an apocalyptic number.

It is an amenable number.

30515428 is a deficient number, since it is larger than the sum of its proper divisors (23081304).

30515428 is a wasteful number, since it uses less digits than its factorization.

30515428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27822 (or 27820 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 30515428 is about 5524.0771174921. The cubic root of 30515428 is about 312.4926607343.

The spelling of 30515428 in words is "thirty million, five hundred fifteen thousand, four hundred twenty-eight".