30890561 has 8 divisors (see below), whose sum is σ = 35017920. Its totient is φ = 27013392.

The previous prime is 30890557. The next prime is 30890593. The reversal of 30890561 is 16509803.

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 30890561 - 2² = 30890557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30890521) 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 7 ways as a sum of consecutive naturals, for example, 62285 + ... + 62778.

It is an arithmetic number, because the mean of its divisors is an integer number (4377240).

Almost surely, 2^30890561 is an apocalyptic number.

It is an amenable number.

30890561 is a deficient number, since it is larger than the sum of its proper divisors (4127359).

30890561 is a wasteful number, since it uses less digits than its factorization.

30890561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125095.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 30890561 is about 5557.9277613154. The cubic root of 30890561 is about 313.7679631837.

The spelling of 30890561 in words is "thirty million, eight hundred ninety thousand, five hundred sixty-one".