309484740 has 48 divisors (see below), whose sum is σ = 878774400. Its totient is φ = 81365760.

The previous prime is 309484733. The next prime is 309484753. The reversal of 309484740 is 47484903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32065 + ... + 40584.

It is an arithmetic number, because the mean of its divisors is an integer number (18307800).

Almost surely, 2^309484740 is an apocalyptic number.

309484740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

309484740 is an abundant number, since it is smaller than the sum of its proper divisors (569289660).

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

309484740 is a wasteful number, since it uses less digits than its factorization.

309484740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72732 (or 72730 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 309484740 is about 17592.1783756305. The cubic root of 309484740 is about 676.4147665298.

The spelling of 309484740 in words is "three hundred nine million, four hundred eighty-four thousand, seven hundred forty".