30889561 has 8 divisors (see below), whose sum is σ = 33591240. Its totient is φ = 28286208.

The previous prime is 30889559. The next prime is 30889571. The reversal of 30889561 is 16598803.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9211225 + 21678336 = 3035^2 + 4656^2 .

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 30889561 - 2¹ = 30889559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30889511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23926 + ... + 25183.

It is an arithmetic number, because the mean of its divisors is an integer number (4198905).

Almost surely, 2^30889561 is an apocalyptic number.

It is an amenable number.

30889561 is a deficient number, since it is larger than the sum of its proper divisors (2701679).

30889561 is a wasteful number, since it uses less digits than its factorization.

30889561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49163.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 30889561 is about 5557.8377990006. The cubic root of 30889561 is about 313.7645773453.

The spelling of 30889561 in words is "thirty million, eight hundred eighty-nine thousand, five hundred sixty-one".