30805245 has 32 divisors (see below), whose sum is σ = 55123200. Its totient is φ = 16322112.

The previous prime is 30805237. The next prime is 30805259. The reversal of 30805245 is 54250803.

It is not a de Polignac number, because 30805245 - 2³ = 30805237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22696 + ... + 24014.

It is an arithmetic number, because the mean of its divisors is an integer number (1722600).

Almost surely, 2^30805245 is an apocalyptic number.

It is an amenable number.

30805245 is a deficient number, since it is larger than the sum of its proper divisors (24317955).

30805245 is a wasteful number, since it uses less digits than its factorization.

30805245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506 (or 1500 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 30805245 is about 5550.2472917880. The cubic root of 30805245 is about 313.4788337625.

The spelling of 30805245 in words is "thirty million, eight hundred five thousand, two hundred forty-five".