309309402 has 8 divisors (see below), whose sum is σ = 618618816. Its totient is φ = 103103132.

The previous prime is 309309401. The next prime is 309309419. The reversal of 309309402 is 204903903.

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

309309402 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 309309402.

It is not an unprimeable number, because it can be changed into a prime (309309401) by changing a digit.

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, 25775778 + ... + 25775789.

It is an arithmetic number, because the mean of its divisors is an integer number (77327352).

Almost surely, 2^309309402 is an apocalyptic number.

309309402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

309309402 is a wasteful number, since it uses less digits than its factorization.

309309402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51551572.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 309309402 is about 17587.1942617349. The cubic root of 309309402 is about 676.2870018920.

The spelling of 309309402 in words is "three hundred nine million, three hundred nine thousand, four hundred two".