30643855 has 12 divisors (see below), whose sum is σ = 40420296. Its totient is φ = 22286000.

The previous prime is 30643831. The next prime is 30643871. The reversal of 30643855 is 55834603.

It is not a de Polignac number, because 30643855 - 2⁷ = 30643727 is a prime.

It is a super-2 number, since 2×30643855² = 1878091698522050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30643855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24721 + ... + 25930.

It is an arithmetic number, because the mean of its divisors is an integer number (3368358).

Almost surely, 2^30643855 is an apocalyptic number.

30643855 is a deficient number, since it is larger than the sum of its proper divisors (9776441).

30643855 is a wasteful number, since it uses less digits than its factorization.

30643855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50678 (or 50667 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 30643855 is about 5535.6892073165. The cubic root of 30643855 is about 312.9304319252.

The spelling of 30643855 in words is "thirty million, six hundred forty-three thousand, eight hundred fifty-five".