306640387824 has 160 divisors (see below), whose sum is σ = 852521060160. Its totient is φ = 94632738816.

The previous prime is 306640387793. The next prime is 306640387883. The reversal of 306640387824 is 428783046603.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14296212 + ... + 14317644.

It is an arithmetic number, because the mean of its divisors is an integer number (5328256626).

Almost surely, 2^306640387824 is an apocalyptic number.

306640387824 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 306640387824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426260530080).

306640387824 is an abundant number, since it is smaller than the sum of its proper divisors (545880672336).

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

306640387824 is a wasteful number, since it uses less digits than its factorization.

306640387824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21747 (or 21741 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 51.

The spelling of 306640387824 in words is "three hundred six billion, six hundred forty million, three hundred eighty-seven thousand, eight hundred twenty-four".