30720794 has 12 divisors (see below), whose sum is σ = 49671594. Its totient is φ = 14165784.

The previous prime is 30720793. The next prime is 30720797. The reversal of 30720794 is 49702703.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 29539225 + 1181569 = 5435^2 + 1087^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30720794.

It is not an unprimeable number, because it can be changed into a prime (30720793) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27719 + ... + 28805.

Almost surely, 2^30720794 is an apocalyptic number.

30720794 is a deficient number, since it is larger than the sum of its proper divisors (18950800).

30720794 is an equidigital number, since it uses as much as digits as its factorization.

30720794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 30720794 is about 5542.6342112754. The cubic root of 30720794 is about 313.1921095384.

The spelling of 30720794 in words is "thirty million, seven hundred twenty thousand, seven hundred ninety-four".