30549128 has 8 divisors (see below), whose sum is σ = 57279630. Its totient is φ = 15274560.

The previous prime is 30549121. The next prime is 30549133. The reversal of 30549128 is 82194503.

It can be written as a sum of positive squares in only one way, i.e., 30492484 + 56644 = 5522^2 + 238^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 30549094 and 30549103.

It is not an unprimeable number, because it can be changed into a prime (30549121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1909313 + ... + 1909328.

Almost surely, 2^30549128 is an apocalyptic number.

It is an amenable number.

30549128 is a deficient number, since it is larger than the sum of its proper divisors (26730502).

30549128 is a wasteful number, since it uses less digits than its factorization.

30549128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3818647 (or 3818643 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 30549128 is about 5527.1265590721. The cubic root of 30549128 is about 312.6076531503.

The spelling of 30549128 in words is "thirty million, five hundred forty-nine thousand, one hundred twenty-eight".