30409989 has 8 divisors (see below), whose sum is σ = 40948512. Its totient is φ = 20072400.

The previous prime is 30409931. The next prime is 30409993. The reversal of 30409989 is 98990403.

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

It is not a de Polignac number, because 30409989 - 2¹⁹ = 29885701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30409989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30409909) 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, 49879 + ... + 50484.

It is an arithmetic number, because the mean of its divisors is an integer number (5118564).

Almost surely, 2^30409989 is an apocalyptic number.

It is an amenable number.

30409989 is a deficient number, since it is larger than the sum of its proper divisors (10538523).

30409989 is a wasteful number, since it uses less digits than its factorization.

30409989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100467.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 30409989 is about 5514.5252742190. The cubic root of 30409989 is about 312.1323300432.

The spelling of 30409989 in words is "thirty million, four hundred nine thousand, nine hundred eighty-nine".