30506745 has 8 divisors (see below), whose sum is σ = 48810816. Its totient is φ = 16270256.

The previous prime is 30506731. The next prime is 30506803. The reversal of 30506745 is 54760503.

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

It is a cyclic number.

It is not a de Polignac number, because 30506745 - 2⁷ = 30506617 is a prime.

It is a super-2 number, since 2×30506745² = 1861322980990050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016877 + ... + 1016906.

It is an arithmetic number, because the mean of its divisors is an integer number (6101352).

Almost surely, 2^30506745 is an apocalyptic number.

It is an amenable number.

30506745 is a deficient number, since it is larger than the sum of its proper divisors (18304071).

30506745 is a wasteful number, since it uses less digits than its factorization.

30506745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033791.

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 30506745 is about 5523.2911384427. The cubic root of 30506745 is about 312.4630185571.

Subtracting from 30506745 its product of nonzero digits (12600), we obtain a triangular number (30494145 = T₇₈₀₉).

The spelling of 30506745 in words is "thirty million, five hundred six thousand, seven hundred forty-five".