30720994 has 8 divisors (see below), whose sum is σ = 46348380. Its totient is φ = 15271536.

The previous prime is 30720983. The next prime is 30721001. The reversal of 30720994 is 49902703.

It can be written as a sum of positive squares in 2 ways, for example, as 23882769 + 6838225 = 4887^2 + 2615^2 .

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

It is an unprimeable number.

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, 44049 + ... + 44740.

Almost surely, 2^30720994 is an apocalyptic number.

30720994 is a deficient number, since it is larger than the sum of its proper divisors (15627386).

30720994 is a wasteful number, since it uses less digits than its factorization.

30720994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88964.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 30720994 is about 5542.6522532087. The cubic root of 30720994 is about 313.1927891897.

The spelling of 30720994 in words is "thirty million, seven hundred twenty thousand, nine hundred ninety-four".