30278128219 has 4 divisors (see below), whose sum is σ = 30459434544. Its totient is φ = 30096821896.

The previous prime is 30278128217. The next prime is 30278128241. The reversal of 30278128219 is 91282187203.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30278128219 - 2¹ = 30278128217 is a prime.

It is a super-2 number, since 2×30278128219² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30278128213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90652912 + ... + 90653245.

It is an arithmetic number, because the mean of its divisors is an integer number (7614858636).

Almost surely, 2^30278128219 is an apocalyptic number.

30278128219 is a deficient number, since it is larger than the sum of its proper divisors (181306325).

30278128219 is a wasteful number, since it uses less digits than its factorization.

30278128219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181306324.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 30278128219 in words is "thirty billion, two hundred seventy-eight million, one hundred twenty-eight thousand, two hundred nineteen".