30489742 has 4 divisors (see below), whose sum is σ = 45734616. Its totient is φ = 15244870.

The previous prime is 30489733. The next prime is 30489749. The reversal of 30489742 is 24798403.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30489749) 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 as a sum of consecutive naturals, namely, 7622434 + ... + 7622437.

It is an arithmetic number, because the mean of its divisors is an integer number (11433654).

Almost surely, 2^30489742 is an apocalyptic number.

30489742 is a deficient number, since it is larger than the sum of its proper divisors (15244874).

30489742 is a wasteful number, since it uses less digits than its factorization.

30489742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15244873.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 30489742 is about 5521.7517148094. The cubic root of 30489742 is about 312.4049571235.

The spelling of 30489742 in words is "thirty million, four hundred eighty-nine thousand, seven hundred forty-two".