30380906 has 4 divisors (see below), whose sum is σ = 45571362. Its totient is φ = 15190452.

The previous prime is 30380879. The next prime is 30380923. The reversal of 30380906 is 60908303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60908303 = 331 ⋅184013.

It can be written as a sum of positive squares in only one way, i.e., 15673681 + 14707225 = 3959^2 + 3835^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7595225 + ... + 7595228.

Almost surely, 2^30380906 is an apocalyptic number.

30380906 is a deficient number, since it is larger than the sum of its proper divisors (15190456).

30380906 is a wasteful number, since it uses less digits than its factorization.

30380906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15190455.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 30380906 is about 5511.8876984206. The cubic root of 30380906 is about 312.0327943285.

The spelling of 30380906 in words is "thirty million, three hundred eighty thousand, nine hundred six".