309472768 has 40 divisors (see below), whose sum is σ = 674566200. Its totient is φ = 140666880.

The previous prime is 309472747. The next prime is 309472771. The reversal of 309472768 is 867274903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21843 + ... + 33106.

It is an arithmetic number, because the mean of its divisors is an integer number (16864155).

Almost surely, 2^309472768 is an apocalyptic number.

It is an amenable number.

309472768 is an abundant number, since it is smaller than the sum of its proper divisors (365093432).

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

309472768 is an equidigital number, since it uses as much as digits as its factorization.

309472768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54978 (or 54962 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 46.

The square root of 309472768 is about 17591.8381074861. The cubic root of 309472768 is about 676.4060443529.

The spelling of 309472768 in words is "three hundred nine million, four hundred seventy-two thousand, seven hundred sixty-eight".