30981430 has 16 divisors (see below), whose sum is σ = 56473920. Its totient is φ = 12235392.

The previous prime is 30981427. The next prime is 30981443. The reversal of 30981430 is 3418903.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18819 + ... + 20398.

It is an arithmetic number, because the mean of its divisors is an integer number (3529620).

Almost surely, 2^30981430 is an apocalyptic number.

30981430 is a deficient number, since it is larger than the sum of its proper divisors (25492490).

30981430 is a wasteful number, since it uses less digits than its factorization.

30981430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39303.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 30981430 is about 5566.0964777840. The cubic root of 30981430 is about 314.0753264318.

The spelling of 30981430 in words is "thirty million, nine hundred eighty-one thousand, four hundred thirty".