30508989 has 8 divisors (see below), whose sum is σ = 46489920. Its totient is φ = 17433696.

The previous prime is 30508949. The next prime is 30508993. The reversal of 30508989 is 98980503.

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

It is not a de Polignac number, because 30508989 - 2⁸ = 30508733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30508989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30508949) 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, 726384 + ... + 726425.

It is an arithmetic number, because the mean of its divisors is an integer number (5811240).

Almost surely, 2^30508989 is an apocalyptic number.

It is an amenable number.

30508989 is a deficient number, since it is larger than the sum of its proper divisors (15980931).

30508989 is a wasteful number, since it uses less digits than its factorization.

30508989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452819.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 30508989 is about 5523.4942744607. The cubic root of 30508989 is about 312.4706797024.

The spelling of 30508989 in words is "thirty million, five hundred eight thousand, nine hundred eighty-nine".