309985478300 has 144 divisors (see below), whose sum is σ = 732185824608. Its totient is φ = 113437900800.

The previous prime is 309985478219. The next prime is 309985478321. The reversal of 309985478300 is 3874589903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98814332 + ... + 98817468.

It is an arithmetic number, because the mean of its divisors is an integer number (5084623782).

Almost surely, 2^309985478300 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309985478300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366092912304).

309985478300 is an abundant number, since it is smaller than the sum of its proper divisors (422200346308).

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

309985478300 is a wasteful number, since it uses less digits than its factorization.

309985478300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4776 (or 4769 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 309985478300 in words is "three hundred nine billion, nine hundred eighty-five million, four hundred seventy-eight thousand, three hundred".