30947738 has 8 divisors (see below), whose sum is σ = 46539732. Its totient is φ = 15434496.

The previous prime is 30947737. The next prime is 30947773. The reversal of 30947738 is 83774903.

It can be written as a sum of positive squares in 2 ways, for example, as 29953729 + 994009 = 5473^2 + 997^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 30947695 and 30947704.

It is not an unprimeable number, because it can be changed into a prime (30947737) 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 3 ways as a sum of consecutive naturals, for example, 18695 + ... + 20282.

Almost surely, 2^30947738 is an apocalyptic number.

30947738 is a deficient number, since it is larger than the sum of its proper divisors (15591994).

30947738 is a wasteful number, since it uses less digits than its factorization.

30947738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39376.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 30947738 is about 5563.0691169533. The cubic root of 30947738 is about 313.9614338613.

The spelling of 30947738 in words is "thirty million, nine hundred forty-seven thousand, seven hundred thirty-eight".