30304989 has 64 divisors (see below), whose sum is σ = 54190080. Its totient is φ = 16493760.

The previous prime is 30304979. The next prime is 30304991. The reversal of 30304989 is 98940303.

It is not a de Polignac number, because 30304989 - 2⁵ = 30304957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30304979) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 181384 + ... + 181550.

It is an arithmetic number, because the mean of its divisors is an integer number (846720).

Almost surely, 2^30304989 is an apocalyptic number.

30304989 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

30304989 is a deficient number, since it is larger than the sum of its proper divisors (23885091).

30304989 is a wasteful number, since it uses less digits than its factorization.

30304989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 30304989 is about 5504.9967302443. The cubic root of 30304989 is about 311.7726709425.

Adding to 30304989 its sum of digits (36), we get a square (30305025 = 5505²).

The spelling of 30304989 in words is "thirty million, three hundred four thousand, nine hundred eighty-nine".