309182042 has 8 divisors (see below), whose sum is σ = 499447956. Its totient is φ = 142699392.

The previous prime is 309182039. The next prime is 309182047. The reversal of 309182042 is 240281903.

It can be written as a sum of positive squares in 2 ways, for example, as 309021241 + 160801 = 17579^2 + 401^2 .

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 = 309181996 and 309182014.

It is not an unprimeable number, because it can be changed into a prime (309182047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5945783 + ... + 5945834.

Almost surely, 2^309182042 is an apocalyptic number.

309182042 is a deficient number, since it is larger than the sum of its proper divisors (190265914).

309182042 is a wasteful number, since it uses less digits than its factorization.

309182042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11891632.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 309182042 is about 17583.5730726152. The cubic root of 309182042 is about 676.1941674071.

The spelling of 309182042 in words is "three hundred nine million, one hundred eighty-two thousand, forty-two".