30489889 has 4 divisors (see below), whose sum is σ = 32094640. Its totient is φ = 28885140.

The previous prime is 30489869. The next prime is 30489911. The reversal of 30489889 is 98898403.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30489889 - 2¹⁵ = 30457121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30489829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 802347 + ... + 802384.

It is an arithmetic number, because the mean of its divisors is an integer number (8023660).

Almost surely, 2^30489889 is an apocalyptic number.

It is an amenable number.

30489889 is a deficient number, since it is larger than the sum of its proper divisors (1604751).

30489889 is a wasteful number, since it uses less digits than its factorization.

30489889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604750.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 30489889 is about 5521.7650257866. The cubic root of 30489889 is about 312.4054591881.

The spelling of 30489889 in words is "thirty million, four hundred eighty-nine thousand, eight hundred eighty-nine".