30380391 has 6 divisors (see below), whose sum is σ = 43882800. Its totient is φ = 20253588.

The previous prime is 30380387. The next prime is 30380393. The reversal of 30380391 is 19308303.

It is not a de Polignac number, because 30380391 - 2² = 30380387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30380393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1687791 + ... + 1687808.

It is an arithmetic number, because the mean of its divisors is an integer number (7313800).

Almost surely, 2^30380391 is an apocalyptic number.

30380391 is a deficient number, since it is larger than the sum of its proper divisors (13502409).

30380391 is a wasteful number, since it uses less digits than its factorization.

30380391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375605 (or 3375602 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 30380391 is about 5511.8409810153. The cubic root of 30380391 is about 312.0310311838.

Adding to 30380391 its reverse (19308303), we get a palindrome (49688694).

The spelling of 30380391 in words is "thirty million, three hundred eighty thousand, three hundred ninety-one".