309987127312 has 80 divisors (see below), whose sum is σ = 622474048000. Its totient is φ = 149390438400.

The previous prime is 309987127309. The next prime is 309987127321. The reversal of 309987127312 is 213721789903.

It is a self number, because there is not a number n which added to its sum of digits gives 309987127312.

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, 166569262 + ... + 166571122.

It is an arithmetic number, because the mean of its divisors is an integer number (7780925600).

Almost surely, 2^309987127312 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 309987127312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311237024000).

309987127312 is an abundant number, since it is smaller than the sum of its proper divisors (312486920688).

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

309987127312 is a wasteful number, since it uses less digits than its factorization.

309987127312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072 (or 3066 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 52.

The spelling of 309987127312 in words is "three hundred nine billion, nine hundred eighty-seven million, one hundred twenty-seven thousand, three hundred twelve".