309438893684 has 12 divisors (see below), whose sum is σ = 541526841408. Its totient is φ = 154716939000.

The previous prime is 309438893681. The next prime is 309438893711. The reversal of 309438893684 is 486398834903.

It is a self number, because there is not a number n which added to its sum of digits gives 309438893684.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309438893681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334142 + ... + 854709.

It is an arithmetic number, because the mean of its divisors is an integer number (45127236784).

Almost surely, 2^309438893684 is an apocalyptic number.

It is an amenable number.

309438893684 is a deficient number, since it is larger than the sum of its proper divisors (232087947724).

309438893684 is a wasteful number, since it uses less digits than its factorization.

309438893684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253926 (or 1253924 counting only the distinct ones).

The product of its (nonzero) digits is 107495424, while the sum is 65.

The spelling of 309438893684 in words is "three hundred nine billion, four hundred thirty-eight million, eight hundred ninety-three thousand, six hundred eighty-four".