30810989 has 12 divisors (see below), whose sum is σ = 35478720. Its totient is φ = 26532360.

The previous prime is 30810979. The next prime is 30811009. The reversal of 30810989 is 98901803.

It is a de Polignac number, because none of the positive numbers 2^k-30810989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30810929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92 + ... + 7850.

It is an arithmetic number, because the mean of its divisors is an integer number (2956560).

Almost surely, 2^30810989 is an apocalyptic number.

It is an amenable number.

30810989 is a deficient number, since it is larger than the sum of its proper divisors (4667731).

30810989 is a wasteful number, since it uses less digits than its factorization.

30810989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7808 (or 7789 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 30810989 is about 5550.7647220901. The cubic root of 30810989 is about 313.4983164893.

The spelling of 30810989 in words is "thirty million, eight hundred ten thousand, nine hundred eighty-nine".