30278133 has 6 divisors (see below), whose sum is σ = 43735094. Its totient is φ = 20185416.

The previous prime is 30278119. The next prime is 30278177. The reversal of 30278133 is 33187203.

It can be written as a sum of positive squares in only one way, i.e., 26286129 + 3992004 = 5127^2 + 1998^2 .

It is not a de Polignac number, because 30278133 - 2²⁴ = 13500917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30278097 and 30278106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30278113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1682110 + ... + 1682127.

Almost surely, 2^30278133 is an apocalyptic number.

It is an amenable number.

30278133 is a deficient number, since it is larger than the sum of its proper divisors (13456961).

30278133 is a wasteful number, since it uses less digits than its factorization.

30278133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364243 (or 3364240 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 30278133 is about 5502.5569510910. The cubic root of 30278133 is about 311.6805470415.

The spelling of 30278133 in words is "thirty million, two hundred seventy-eight thousand, one hundred thirty-three".