30918401 has 4 divisors (see below), whose sum is σ = 31051332. Its totient is φ = 30785472.

The previous prime is 30918389. The next prime is 30918409. The reversal of 30918401 is 10481903.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2027776 + 28890625 = 1424^2 + 5375^2 .

It is a cyclic number.

It is not a de Polignac number, because 30918401 - 2⁶ = 30918337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30918409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66116 + ... + 66581.

It is an arithmetic number, because the mean of its divisors is an integer number (7762833).

Almost surely, 2^30918401 is an apocalyptic number.

It is an amenable number.

30918401 is a deficient number, since it is larger than the sum of its proper divisors (132931).

30918401 is a wasteful number, since it uses less digits than its factorization.

30918401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132930.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 30918401 is about 5560.4317278427. The cubic root of 30918401 is about 313.8621956063.

The spelling of 30918401 in words is "thirty million, nine hundred eighteen thousand, four hundred one".