309472284 has 48 divisors (see below), whose sum is σ = 834091776. Its totient is φ = 88262400.

The previous prime is 309472279. The next prime is 309472307. The reversal of 309472284 is 482274903.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66712 + ... + 71199.

It is an arithmetic number, because the mean of its divisors is an integer number (17376912).

Almost surely, 2^309472284 is an apocalyptic number.

309472284 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

309472284 is an abundant number, since it is smaller than the sum of its proper divisors (524619492).

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

309472284 is a wasteful number, since it uses less digits than its factorization.

309472284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137946 (or 137944 counting only the distinct ones).

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

The square root of 309472284 is about 17591.8243511013. The cubic root of 309472284 is about 676.4056917309.

The spelling of 309472284 in words is "three hundred nine million, four hundred seventy-two thousand, two hundred eighty-four".