30989645 has 8 divisors (see below), whose sum is σ = 38094840. Its totient is φ = 24186880.

The previous prime is 30989617. The next prime is 30989669. The reversal of 30989645 is 54698903.

It can be written as a sum of positive squares in 4 ways, for example, as 4012009 + 26977636 = 2003^2 + 5194^2 .

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

It is not a de Polignac number, because 30989645 - 2¹⁰ = 30988621 is a prime.

It is a super-3 number, since 3×30989645³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30989596 and 30989605.

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, 75380 + ... + 75789.

It is an arithmetic number, because the mean of its divisors is an integer number (4761855).

Almost surely, 2^30989645 is an apocalyptic number.

It is an amenable number.

30989645 is a deficient number, since it is larger than the sum of its proper divisors (7105195).

30989645 is a wasteful number, since it uses less digits than its factorization.

30989645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151215.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 30989645 is about 5566.8343787111. The cubic root of 30989645 is about 314.1030839281.

The spelling of 30989645 in words is "thirty million, nine hundred eighty-nine thousand, six hundred forty-five".