30947805 has 32 divisors (see below), whose sum is σ = 62880000. Its totient is φ = 14147136.

The previous prime is 30947783. The next prime is 30947821. The reversal of 30947805 is 50874903.

It is not a de Polignac number, because 30947805 - 2⁵ = 30947773 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30947805.

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, 15430 + ... + 17319.

It is an arithmetic number, because the mean of its divisors is an integer number (1965000).

Almost surely, 2^30947805 is an apocalyptic number.

30947805 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30947805 is an abundant number, since it is smaller than the sum of its proper divisors (31932195).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30947805 is a wasteful number, since it uses less digits than its factorization.

30947805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32770 (or 32764 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 30947805 is about 5563.0751388059. The cubic root of 30947805 is about 313.9616604304.

The spelling of 30947805 in words is "thirty million, nine hundred forty-seven thousand, eight hundred five".