309328464 has 80 divisors (see below), whose sum is σ = 852588288. Its totient is φ = 96301056.

The previous prime is 309328451. The next prime is 309328501. The reversal of 309328464 is 464823903.

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, 110409 + ... + 113175.

Almost surely, 2^309328464 is an apocalyptic number.

309328464 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309328464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426294144).

309328464 is an abundant number, since it is smaller than the sum of its proper divisors (543259824).

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

309328464 is a wasteful number, since it uses less digits than its factorization.

309328464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932 (or 2926 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 309328464 is about 17587.7361817830. The cubic root of 309328464 is about 676.3008942578.

The spelling of 309328464 in words is "three hundred nine million, three hundred twenty-eight thousand, four hundred sixty-four".