30840427 has 4 divisors (see below), whose sum is σ = 31903920. Its totient is φ = 29776936.

The previous prime is 30840389. The next prime is 30840449. The reversal of 30840427 is 72404803.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72404803 = 5153 ⋅14051.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30840427 is a prime.

It is a super-2 number, since 2×30840427² = 1902263875084658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30840395 and 30840404.

It is not an unprimeable number, because it can be changed into a prime (30840457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531703 + ... + 531760.

It is an arithmetic number, because the mean of its divisors is an integer number (7975980).

Almost surely, 2^30840427 is an apocalyptic number.

30840427 is a deficient number, since it is larger than the sum of its proper divisors (1063493).

30840427 is a wasteful number, since it uses less digits than its factorization.

30840427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063492.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 30840427 is about 5553.4157957063. The cubic root of 30840427 is about 313.5981274780.

The spelling of 30840427 in words is "thirty million, eight hundred forty thousand, four hundred twenty-seven".