30989842 has 32 divisors (see below), whose sum is σ = 52291008. Its totient is φ = 13680576.

The previous prime is 30989839. The next prime is 30989843. The reversal of 30989842 is 24898903.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (30989843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58993 + ... + 59515.

It is an arithmetic number, because the mean of its divisors is an integer number (1634094).

Almost surely, 2^30989842 is an apocalyptic number.

30989842 is a deficient number, since it is larger than the sum of its proper divisors (21301166).

30989842 is a wasteful number, since it uses less digits than its factorization.

30989842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 30989842 is about 5566.8520727607. The cubic root of 30989842 is about 314.1037495072.

The spelling of 30989842 in words is "thirty million, nine hundred eighty-nine thousand, eight hundred forty-two".