308430811 has 16 divisors (see below), whose sum is σ = 344752128. Its totient is φ = 274010400.

The previous prime is 308430769. The next prime is 308430877. The reversal of 308430811 is 118034803.

It is a cyclic number.

It is not a de Polignac number, because 308430811 - 2²⁵ = 274876379 is a prime.

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 308430811.

It is not an unprimeable number, because it can be changed into a prime (308430511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74970 + ... + 78976.

It is an arithmetic number, because the mean of its divisors is an integer number (21547008).

Almost surely, 2^308430811 is an apocalyptic number.

308430811 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

308430811 is a deficient number, since it is larger than the sum of its proper divisors (36321317).

308430811 is a wasteful number, since it uses less digits than its factorization.

308430811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 308430811 is about 17562.1983532814. The cubic root of 308430811 is about 675.6460652910.

The spelling of 308430811 in words is "three hundred eight million, four hundred thirty thousand, eight hundred eleven".