30381406 has 32 divisors (see below), whose sum is σ = 51070176. Its totient is φ = 13552000.

The previous prime is 30381371. The next prime is 30381419. The reversal of 30381406 is 60418303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268806 + ... + 268918.

It is an arithmetic number, because the mean of its divisors is an integer number (1595943).

Almost surely, 2^30381406 is an apocalyptic number.

30381406 is a deficient number, since it is larger than the sum of its proper divisors (20688770).

30381406 is a wasteful number, since it uses less digits than its factorization.

30381406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 30381406 is about 5511.9330547459. The cubic root of 30381406 is about 312.0345061003.

Adding to 30381406 its reverse (60418303), we get a palindrome (90799709).

It can be divided in two parts, 3038 and 1406, that added together give a palindrome (4444).

The spelling of 30381406 in words is "thirty million, three hundred eighty-one thousand, four hundred six".