309800830 has 8 divisors (see below), whose sum is σ = 557641512. Its totient is φ = 123920328.

The previous prime is 309800819. The next prime is 309800851. The reversal of 309800830 is 38008903.

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

It is a junction number, because it is equal to n+sod(n) for n = 309800792 and 309800801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15490032 + ... + 15490051.

It is an arithmetic number, because the mean of its divisors is an integer number (69705189).

Almost surely, 2^309800830 is an apocalyptic number.

309800830 is a deficient number, since it is larger than the sum of its proper divisors (247840682).

309800830 is a wasteful number, since it uses less digits than its factorization.

309800830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30980090.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 309800830 is about 17601.1599049608. The cubic root of 309800830 is about 676.6449719507.

The spelling of 309800830 in words is "three hundred nine million, eight hundred thousand, eight hundred thirty".