309494946 has 32 divisors (see below), whose sum is σ = 649912320. Its totient is φ = 98067024.

The previous prime is 309494929. The next prime is 309494947. The reversal of 309494946 is 649494903.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 309494895 and 309494904.

It is not an unprimeable number, because it can be changed into a prime (309494947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15615 + ... + 29373.

It is an arithmetic number, because the mean of its divisors is an integer number (20309760).

Almost surely, 2^309494946 is an apocalyptic number.

309494946 is an abundant number, since it is smaller than the sum of its proper divisors (340417374).

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

309494946 is a wasteful number, since it uses less digits than its factorization.

309494946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13950.

The product of its (nonzero) digits is 839808, while the sum is 48.

The square root of 309494946 is about 17592.4684453319. The cubic root of 309494946 is about 676.4222019134.

The spelling of 309494946 in words is "three hundred nine million, four hundred ninety-four thousand, nine hundred forty-six".