309466861380 has 144 divisors (see below), whose sum is σ = 976629448704. Its totient is φ = 79233396480.

The previous prime is 309466861373. The next prime is 309466861381. The reversal of 309466861380 is 83168664903.

It is not an unprimeable number, because it can be changed into a prime (309466861381) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 490314 + ... + 927006.

Almost surely, 2^309466861380 is an apocalyptic number.

309466861380 is a gapful number since it is divisible by the number (30) 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 309466861380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (488314724352).

309466861380 is an abundant number, since it is smaller than the sum of its proper divisors (667162587324).

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

309466861380 is a wasteful number, since it uses less digits than its factorization.

309466861380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436866 (or 436861 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 309466861380 in words is "three hundred nine billion, four hundred sixty-six million, eight hundred sixty-one thousand, three hundred eighty".