30388066 has 4 divisors (see below), whose sum is σ = 45582102. Its totient is φ = 15194032.

The previous prime is 30388021. The next prime is 30388069. The reversal of 30388066 is 66088303.

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

It can be written as a sum of positive squares in only one way, i.e., 17464041 + 12924025 = 4179^2 + 3595^2 .

It is not an unprimeable number, because it can be changed into a prime (30388069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7597015 + ... + 7597018.

Almost surely, 2^30388066 is an apocalyptic number.

30388066 is a deficient number, since it is larger than the sum of its proper divisors (15194036).

30388066 is a wasteful number, since it uses less digits than its factorization.

30388066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15194035.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 30388066 is about 5512.5371654076. The cubic root of 30388066 is about 312.0573051108.

The spelling of 30388066 in words is "thirty million, three hundred eighty-eight thousand, sixty-six".