309485472 has 48 divisors (see below), whose sum is σ = 815123232. Its totient is φ = 102816000.

The previous prime is 309485467. The next prime is 309485531. The reversal of 309485472 is 274584903.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24222 + ... + 34722.

It is an arithmetic number, because the mean of its divisors is an integer number (16981734).

Almost surely, 2^309485472 is an apocalyptic number.

309485472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

309485472 is an abundant number, since it is smaller than the sum of its proper divisors (505637760).

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

309485472 is a wasteful number, since it uses less digits than its factorization.

309485472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10821 (or 10813 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 309485472 is about 17592.1991803185. The cubic root of 309485472 is about 676.4152998197.

The spelling of 309485472 in words is "three hundred nine million, four hundred eighty-five thousand, four hundred seventy-two".