309685468 has 24 divisors (see below), whose sum is σ = 551426400. Its totient is φ = 152156928.

The previous prime is 309685463. The next prime is 309685477. The reversal of 309685468 is 864586903.

It is a happy number.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309685463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56848 + ... + 62056.

It is an arithmetic number, because the mean of its divisors is an integer number (22976100).

Almost surely, 2^309685468 is an apocalyptic number.

It is an amenable number.

309685468 is a deficient number, since it is larger than the sum of its proper divisors (241740932).

309685468 is a wasteful number, since it uses less digits than its factorization.

309685468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5469 (or 5467 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 49.

The square root of 309685468 is about 17597.8824862539. The cubic root of 309685468 is about 676.5609730275.

The spelling of 309685468 in words is "three hundred nine million, six hundred eighty-five thousand, four hundred sixty-eight".