30430981 has 8 divisors (see below), whose sum is σ = 34841664. Its totient is φ = 26036160.

The previous prime is 30430973. The next prime is 30431021. The reversal of 30430981 is 18903403.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30430981 - 2³ = 30430973 is a prime.

It is a super-2 number, since 2×30430981² = 1852089209244722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30430481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486 + ... + 7816.

It is an arithmetic number, because the mean of its divisors is an integer number (4355208).

Almost surely, 2^30430981 is an apocalyptic number.

It is an amenable number.

30430981 is a deficient number, since it is larger than the sum of its proper divisors (4410683).

30430981 is an equidigital number, since it uses as much as digits as its factorization.

30430981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7931.

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

The square root of 30430981 is about 5516.4282828656. The cubic root of 30430981 is about 312.2041351198.

The spelling of 30430981 in words is "thirty million, four hundred thirty thousand, nine hundred eighty-one".