30747986 has 8 divisors (see below), whose sum is σ = 46192140. Its totient is φ = 15350608.

The previous prime is 30747973. The next prime is 30747989. The reversal of 30747986 is 68974703.

It can be written as a sum of positive squares in 2 ways, for example, as 30747025 + 961 = 5545^2 + 31^2 .

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

It is not an unprimeable number, because it can be changed into a prime (30747989) 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, 10001 + ... + 12708.

Almost surely, 2^30747986 is an apocalyptic number.

30747986 is a deficient number, since it is larger than the sum of its proper divisors (15444154).

30747986 is a wasteful number, since it uses less digits than its factorization.

30747986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23388.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 30747986 is about 5545.0866539667. The cubic root of 30747986 is about 313.2844878841.

The spelling of 30747986 in words is "thirty million, seven hundred forty-seven thousand, nine hundred eighty-six".